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Buy from Amazon $29.00$0.99 $37.50 $25.00 $12.50 Dec Mar Jun Sep Dec Mar Jun Sep Dec Mar Jun 2014 2015 2016 $23.71, Sep 17 2:24 am$22.53, Nov 19 - Nov 24$22.50, Nov 26 - Dec 27$22.38, Dec 29 - Jan 26$22.26, Jan 27 - Feb 8$22.03, Feb 9 - Feb 17$21.81, Feb 17 - Feb 26$21.59, Feb 27 - Mar 3$21.50, Mar 3 - Jul 27$21.50, Mar 3 - Jul 27$20.23, May 3 - May 28$12.90, May 3 - May 7$21.50, Mar 3 - Jul 27$20.23, May 3 - May 28$12.89, May 7 10:09 pm$21.50, Mar 3 - Jul 27$20.23, May 3 - May 28$12.72, May 10 6:09 pm$21.50, Mar 3 - Jul 27$20.23, May 3 - May 28$12.67, May 13 4:22 am$21.50, Mar 3 - Jul 27$20.23, May 3 - May 28$12.53, May 15 11:13 am$21.50, Mar 3 - Jul 27$20.23, May 3 - May 28$10.76, May 18 7:20 am$21.50, Mar 3 - Jul 27$20.23, May 3 - May 28$10.45, May 20 1:46 pm$21.50, Mar 3 - Jul 27$20.23, May 3 - May 28$8.00, May 22 11:23 pm$21.50, Mar 3 - Jul 27$20.23, May 3 - May 28$7.64, May 25 4:54 pm$21.50, Mar 3 - Jul 27$20.23, May 3 - May 28$7.28, May 28 4:19 am$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$7.03, May 30 6:44 pm$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$6.80, Jun 1 6:03 pm$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$10.56, Jun 2 - Jun 6$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$9.95, Jun 8 - Jun 14$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$8.98, Jun 14 - Jun 24$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$8.96, Jun 24 - Jun 25$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$8.83, Jun 27 12:29 am$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$8.53, Jun 29 7:48 am$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$8.24, Jul 2 7:25 am$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$7.99, Jul 4 4:02 pm$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$7.75, Jul 7 1:27 am$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$7.51, Jul 9 5:22 pm$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$7.29, Jul 12 3:28 am$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$6.87, Jul 14 6:46 pm$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$6.81, Jul 15 11:05 pm$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$6.69, Jul 18 2:32 pm$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$6.52, Jul 21 2:40 pm$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$5.88, Jul 23 9:23 pm$21.50, Mar 3 - Jul 27$19.82, May 29 - Sep 1$5.42, Jul 26 2:42 pm$21.71, Jul 28 - Aug 6$19.82, May 29 - Sep 1$5.50, Jul 29 2:50 am$21.71, Jul 28 - Aug 6$19.82, May 29 - Sep 1$5.25, Jul 30 - Aug 3$21.71, Jul 28 - Aug 6$19.82, May 29 - Sep 1$10.99, Aug 4 - Aug 10$21.92, Aug 7 - Aug 16$19.82, May 29 - Sep 1$10.99, Aug 4 - Aug 10$21.92, Aug 7 - Aug 16$19.82, May 29 - Sep 1$9.87, Aug 13 12:15 pm$21.92, Aug 7 - Aug 16$19.82, May 29 - Sep 1$9.84, Aug 14 - Aug 16$22.72, Aug 17 - Aug 24$19.82, May 29 - Sep 1$9.87, Aug 18 11:32 am$22.72, Aug 17 - Aug 24$19.82, May 29 - Sep 1$9.88, Aug 19 - Aug 21$22.72, Aug 17 - Aug 24$19.82, May 29 - Sep 1$12.93, Aug 22 5:01 pm$22.49, Aug 25 - Aug 30$19.82, May 29 - Sep 1$11.95, Aug 25 9:15 pm$22.49, Aug 25 - Aug 30$19.82, May 29 - Sep 1$9.87, Aug 28 1:29 am$22.49, Aug 25 - Aug 30$19.82, May 29 - Sep 1$9.81, Aug 30 - Sep 27$22.26, Sep 1 - Sep 6$19.82, May 29 - Sep 1$9.81, Aug 30 - Sep 27$22.26, Sep 1 - Sep 6$20.95, Sep 3 2:48 pm$9.81, Aug 30 - Sep 27$22.26, Sep 1 - Sep 6$20.82, Sep 6 - Sep 8$9.81, Aug 30 - Sep 27$22.03, Sep 8 - Sep 14$20.82, Sep 6 - Sep 8$9.81, Aug 30 - Sep 27$22.03, Sep 8 - Sep 14$20.73, Sep 10 - Sep 14$9.81, Aug 30 - Sep 27$21.81, Sep 16 - Sep 23$20.52, Sep 16 - Sep 23$9.81, Aug 30 - Sep 27$21.59, Sep 25 - Nov 19$20.31, Sep 25 - Nov 11$9.81, Aug 30 - Sep 27$21.59, Sep 25 - Nov 19$20.31, Sep 25 - Nov 11$9.88, Sep 28 - Oct 19$21.59, Sep 25 - Nov 19$20.31, Sep 25 - Nov 11$6.72, Oct 22 2:44 am$21.59, Sep 25 - Nov 19$20.31, Sep 25 - Nov 11$6.47, Oct 24 9:10 am$21.59, Sep 25 - Nov 19$20.31, Sep 25 - Nov 11$9.81, Oct 30 7:08 am$21.59, Sep 25 - Nov 19$20.31, Sep 25 - Nov 11$9.87, Nov 4 8:46 pm$21.59, Sep 25 - Nov 19$20.31, Sep 25 - Nov 11$9.88, Nov 11 - Dec 22$21.59, Sep 25 - Nov 19$19.01, Nov 16 - Dec 22$9.88, Nov 11 - Dec 22$22.02, Nov 21 - Dec 24$19.01, Nov 16 - Dec 22$9.88, Nov 11 - Dec 22$22.02, Nov 21 - Dec 24$16.60, Dec 23 - Dec 29$10.00, Dec 23 - Dec 31$21.91, Dec 25 - Dec 31$16.60, Dec 23 - Dec 29$10.00, Dec 23 - Dec 31$21.91, Dec 25 - Dec 31$16.09, Dec 31 - Jan 1$10.00, Dec 23 - Dec 31$21.80, Jan 1 - Jan 6$16.09, Dec 31 - Jan 1$9.88, Jan 1 - Jan 14$21.80, Jan 1 - Jan 6$15.60, Jan 3 - Jan 4$9.88, Jan 1 - Jan 14$21.80, Jan 1 - Jan 6$15.12, Jan 5 - Jan 9$9.88, Jan 1 - Jan 14$21.69, Jan 7 - Jan 12$15.10, Jan 10 3:20 am$9.88, Jan 1 - Jan 14$21.69, Jan 7 - Jan 12$15.04, Jan 12 5:55 pm$9.88, Jan 1 - Jan 14$21.58, Jan 14 - Jan 20$14.56, Jan 14 7:22 am$9.88, Jan 1 - Jan 14$21.58, Jan 14 - Jan 20$14.58, Jan 16 1:30 am$9.65, Jan 16 10:16 pm$21.58, Jan 14 - Jan 20$13.70, Jan 20 - Jan 21$8.20, Jan 20 6:53 am$21.47, Jan 21 - Jan 26$13.70, Jan 20 - Jan 21$7.64, Jan 21 9:36 pm$21.47, Jan 21 - Jan 26$13.28, Jan 23 - Jan 24$7.63, Jan 24 7:54 am$21.36, Jan 27 - Feb 2$12.47, Jan 27 - Jan 28$7.50, Jan 27 - Jan 28$21.36, Jan 27 - Feb 2$19.69, Feb 1 3:46 am$7.18, Feb 1 3:46 am$21.36, Jan 27 - Feb 2$19.74, Feb 2 - Feb 4$7.03, Feb 2 11:21 pm$21.50, Feb 4 - Apr 25$19.73, Feb 6 11:33 am$7.06, Feb 6 - Feb 11$21.50, Feb 4 - Apr 25$19.72, Feb 8 - Feb 9$7.06, Feb 6 - Feb 11$21.50, Feb 4 - Apr 25$19.82, Feb 11 - Mar 9$7.06, Feb 6 - Feb 11$21.50, Feb 4 - Apr 25$19.82, Feb 11 - Mar 9$7.05, Feb 12 8:17 pm$21.50, Feb 4 - Apr 25$19.82, Feb 11 - Mar 9$9.88, Feb 14 - Feb 23$21.50, Feb 4 - Apr 25$19.82, Feb 11 - Mar 9$9.84, Feb 25 3:16 am$21.50, Feb 4 - Apr 25$19.82, Feb 11 - Mar 9$9.74, Feb 28 11:45 pm$21.50, Feb 4 - Apr 25$19.82, Feb 11 - Mar 9$9.62, Mar 2 4:28 am$21.50, Feb 4 - Apr 25$19.82, Feb 11 - Mar 9$9.28, Mar 5 8:11 am$21.50, Feb 4 - Apr 25$19.82, Feb 11 - Mar 9$9.04, Mar 7 8:24 am$21.50, Feb 4 - Apr 25$19.82, Feb 11 - Mar 9$8.78, Mar 9 7:48 am$21.50, Feb 4 - Apr 25$19.81, Mar 11 3:07 pm$8.59, Mar 11 3:07 pm$21.50, Feb 4 - Apr 25$19.79, Mar 15 3:34 am$8.28, Mar 15 3:34 am$21.50, Feb 4 - Apr 25$19.78, Mar 17 3:58 pm$7.95, Mar 17 3:58 pm$21.50, Feb 4 - Apr 25$19.77, Mar 20 1:12 am$7.68, Mar 20 1:12 am$21.50, Feb 4 - Apr 25$19.76, Mar 22 10:07 am$7.43, Mar 22 10:07 am$21.50, Feb 4 - Apr 25$19.75, Mar 24 4:41 pm$7.19, Mar 24 4:41 pm$21.50, Feb 4 - Apr 25$19.73, Mar 26 11:51 pm$6.97, Mar 26 11:51 pm$21.50, Feb 4 - Apr 25$19.72, Mar 29 7:43 am$6.70, Mar 29 7:43 am$21.50, Feb 4 - Apr 25$19.71, Mar 31 4:36 pm$6.37, Mar 31 4:36 pm$21.50, Feb 4 - Apr 25$19.70, Apr 3 8:20 am$6.08, Apr 3 8:20 am$21.50, Feb 4 - Apr 25$19.68, Apr 5 10:48 pm$5.95, Apr 5 - Apr 8$21.50, Feb 4 - Apr 25$19.67, Apr 8 1:51 pm$5.95, Apr 5 - Apr 8$21.50, Feb 4 - Apr 25$19.66, Apr 11 12:59 pm$8.81, Apr 11 - Apr 14$21.50, Feb 4 - Apr 25$19.64, Apr 14 6:13 am$8.81, Apr 11 - Apr 14$21.50, Feb 4 - Apr 25$19.63, Apr 16 9:36 pm$9.46, Apr 16 9:36 pm$21.50, Feb 4 - Apr 25$19.62, Apr 19 12:55 pm$6.18, Apr 19 - Apr 25$21.50, Feb 4 - Apr 25$19.61, Apr 22 5:43 am$6.18, Apr 19 - Apr 25$21.50, Apr 28 - Jul 8$19.60, Apr 28 2:51 am$6.18, Apr 28 2:51 am$21.50, Apr 28 - Jul 8$19.80, Apr 30 9:23 pm$5.97, Apr 30 9:23 pm$21.50, Apr 28 - Jul 8$19.82, May 3 2:02 pm$5.34, May 3 2:02 pm$21.50, Apr 28 - Jul 8$19.81, May 6 8:14 am$4.70, May 6 8:14 am$21.50, Apr 28 - Jul 8$19.82, May 10 - May 25$9.87, May 10 1:28 pm$21.50, Apr 28 - Jul 8$19.82, May 10 - May 25$9.75, May 13 - May 15$21.50, Apr 28 - Jul 8$19.82, May 10 - May 25$9.54, May 17 7:55 am$21.50, Apr 28 - Jul 8$19.82, May 10 - May 25$8.61, May 21 6:54 pm$21.50, Apr 28 - Jul 8$19.82, May 10 - May 25$7.73, May 25 8:05 pm$21.50, Apr 28 - Jul 8$17.56, May 30 8:23 am$7.01, May 30 8:23 am$21.50, Apr 28 - Jul 8$17.66, Jun 3 - Jul 8$6.07, Jun 3 11:42 pm$21.50, Apr 28 - Jul 8$17.66, Jun 3 - Jul 8$5.49, Jun 8 9:27 am$21.50, Apr 28 - Jul 8$17.66, Jun 3 - Jul 8$4.70, Jun 12 7:46 am$21.50, Apr 28 - Jul 8$17.66, Jun 3 - Jul 8$4.05, Jun 16 2:52 am$21.50, Apr 28 - Jul 8$17.66, Jun 3 - Jul 8$3.98, Jun 19 - Jun 23$21.50, Apr 28 - Jul 8$17.66, Jun 3 - Jul 8$3.75, Jun 25 - Jun 29$21.50, Apr 28 - Jul 8$17.66, Jun 3 - Jul 8$3.50, Jul 3 9:08 pm$21.50, Apr 28 - Jul 8$17.66, Jun 3 - Jul 8$3.35, Jul 8 8:25 am$24.94, Jul 13 - Jul 17$17.68, Jul 13 - Aug 4$3.50, Jul 13 9:40 am$24.94, Jul 13 - Jul 17$17.68, Jul 13 - Aug 4$3.44, Jul 17 4:03 am$24.69, Jul 20 - Jul 24$17.68, Jul 13 - Aug 4$3.59, Jul 20 8:22 pm$24.69, Jul 20 - Jul 24$17.68, Jul 13 - Aug 4$3.79, Jul 24 10:04 am$24.44, Jul 27 - Aug 4$17.68, Jul 13 - Aug 4$4.10, Jul 27 11:33 pm$24.44, Jul 27 - Aug 4$17.68, Jul 13 - Aug 4$3.94, Jul 31 2:11 pm$24.44, Jul 27 - Aug 4$17.68, Jul 13 - Aug 4$4.33, Aug 4 - Aug 7$24.42, Aug 7 - Sep 18$20.21, Aug 7 - Sep 7$4.33, Aug 4 - Aug 7$24.42, Aug 7 - Sep 18$20.21, Aug 7 - Sep 7$9.75, Aug 11 3:58 pm$24.42, Aug 7 - Sep 18$20.21, Aug 7 - Sep 7$9.85, Aug 15 9:45 am$24.42, Aug 7 - Sep 18$20.21, Aug 7 - Sep 7$16.90, Aug 19 - Aug 24$24.42, Aug 7 - Sep 18$23.42, Aug 28 - Sep 1$20.21, Aug 7 - Sep 7$24.42, Aug 7 - Sep 18$20.21, Aug 7 - Sep 7$14.41, Sep 5 1:57 am$24.42, Aug 7 - Sep 18$21.00, Sep 9 1:19 am$18.99, Sep 9 - Sep 18$24.42, Aug 7 - Sep 18$20.51, Sep 12 - Sep 30$18.99, Sep 9 - Sep 18$25.77, Sep 22 - Sep 26$20.51, Sep 12 - Sep 30$16.95, Sep 22 - Sep 30$26.72, Sep 30 - Oct 4$20.51, Sep 12 - Sep 30$16.95, Sep 22 - Sep 30$26.72, Sep 30 - Oct 4$21.00, Oct 4 - Nov 29$20.99, Oct 4 3:16 pm$26.98, Oct 8 - Oct 12$21.00, Oct 4 - Nov 29$19.99, Oct 8 6:29 pm$26.98, Oct 8 - Oct 12$21.00, Oct 4 - Nov 29$19.75, Oct 12 7:16 pm$27.24, Oct 16 5:33 pm$21.00, Oct 4 - Nov 29$17.22, Oct 16 5:33 pm$27.51, Oct 20 - Oct 24$21.00, Oct 4 - Nov 29$18.73, Oct 20 2:45 pm$27.51, Oct 20 - Oct 24$21.00, Oct 4 - Nov 29$11.15, Oct 24 11:17 am$27.78, Oct 28 - Nov 1$21.00, Oct 4 - Nov 29$10.76, Oct 28 9:41 am$27.78, Oct 28 - Nov 1$21.00, Oct 4 - Nov 29$10.62, Nov 1 9:02 am$28.05, Nov 5 11:08 am$21.00, Oct 4 - Nov 29$10.56, Nov 5 11:08 am$29.00, Nov 9 - Dec 19$21.00, Oct 4 - Nov 29$12.45, Nov 9 1:19 pm$29.00, Nov 9 - Dec 19$21.00, Oct 4 - Nov 29$12.46, Nov 11 3:30 pm$29.00, Nov 9 - Dec 19$21.00, Oct 4 - Nov 29$12.45, Nov 15 7:42 pm$29.00, Nov 9 - Dec 19$21.00, Oct 4 - Nov 29$12.38, Nov 20 5:10 am$29.00, Nov 9 - Dec 19$21.00, Oct 4 - Nov 29$3.92, Nov 24 3:11 pm$29.00, Nov 9 - Dec 19$21.00, Oct 4 - Nov 29$3.64, Nov 29 7:06 am$29.00, Nov 9 - Dec 19$12.95, Dec 4 - Dec 14$3.44, Dec 4 - Dec 9$29.00, Nov 9 - Dec 19$12.95, Dec 4 - Dec 14$3.21, Dec 14 5:27 am$29.00, Nov 9 - Dec 19$21.00, Dec 19 - Dec 24$3.32, Dec 19 7:44 am$27.84, Dec 24 - Jan 3$21.00, Dec 19 - Dec 24$3.31, Dec 24 3:45 am$27.84, Dec 24 - Jan 3$12.95, Dec 29 - Jan 7$3.32, Dec 29 - Jan 12$27.00, Jan 7 10:01 pm$12.95, Dec 29 - Jan 7$3.32, Dec 29 - Jan 12$26.18, Jan 12 8:29 pm$11.95, Jan 12 8:29 pm$3.32, Dec 29 - Jan 12$26.10, Jan 17 - Jan 28$21.00, Jan 17 - Mar 24$3.25, Jan 17 8:41 pm$26.10, Jan 17 - Jan 28$21.00, Jan 17 - Mar 24$11.90, Jan 22 - Jan 25$26.10, Jan 17 - Jan 28$21.00, Jan 17 - Mar 24$11.85, Jan 28 - Feb 12$25.83, Feb 1 11:50 pm$21.00, Jan 17 - Mar 24$11.85, Jan 28 - Feb 12$29.00, Feb 7 - Feb 23$21.00, Jan 17 - Mar 24$11.85, Jan 28 - Feb 12$29.00, Feb 7 - Feb 23$21.00, Jan 17 - Mar 24$11.90, Feb 17 3:08 pm$29.00, Feb 7 - Feb 23$21.00, Jan 17 - Mar 24$10.80, Feb 23 4:43 am$25.83, Feb 28 - Mar 12$21.00, Jan 17 - Mar 24$6.70, Feb 28 12:09 pm$25.83, Feb 28 - Mar 12$21.00, Jan 17 - Mar 24$10.50, Mar 12 6:47 am$25.57, Mar 24 4:56 am$21.00, Jan 17 - Mar 24$0.99, Mar 24 4:56 am$25.31, Apr 4 4:12 pm$20.36, Apr 4 4:12 pm$10.49, Apr 4 - Apr 10$25.21, Apr 10 - Apr 22$19.74, Apr 10 10:42 am$10.49, Apr 4 - Apr 10$25.21, Apr 10 - Apr 22$20.99, Apr 22 8:06 am$1.85, Apr 22 8:06 am 89,3161,181,542 1,562,500 1,041,667 520,833 Oct Dec Feb Apr Jun Aug Oct Dec Feb Apr Jun 2015 2016

Price Details

New

Latest $25.21 5 hrs ago
Highest $29.00 Feb 7, '16
Lowest $21.36 Jan 27, '15
Average $25.37 (30d avg)
$26.47 (90d avg)
$27.31 (180d avg)
$25.42 (365d avg)
$23.31 (Lifetime average)
Added Sep 17, 2013

3rd Party New

Latest $20.99 5 hrs ago
Highest $21.00 Jan 17, '16
Lowest $11.95 Jan 12, '16
Average $20.38 (30d avg)
$20.79 (90d avg)
$19.31 (180d avg)
$19.31 (365d avg)
$19.32 (Lifetime average)
Added Sep 17, 2013

3rd Party Used

Latest $1.85 5 hrs ago
Highest $23.42 Sep 7, '15
Lowest $0.99 Mar 24, '16
Average $6.75 (30d avg)
$9.23 (90d avg)
$7.66 (180d avg)
$9.09 (365d avg)
$9.06 (Lifetime average)
Added Sep 17, 2013

Sales Rank

30 day average: 678,805
90 day average: 739,198

Product Description

Stressing verbal logic rather than mathematics, Israel M. Kirzner provides at once a thorough critique of contemporary price theory, an essay on the theory of entrepreneurship, and an essay on the theory of competition. offers a new appraisal of quality competition, of selling effort, and of the fundamental weaknesses of contemporary welfare economics.

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