| Concise |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Oct-2007 |
| "CONCISE CIRCULAR SLIDE RULE NO 28 W, CASE, IN | $39.99 | 07-Oct-2007 | 1 |
| Kenworth Concise Circular No. 28N Slide Rule E | $31.00 | 10-Oct-2007 | 12 |
| "3 3"" Circular Slide Rules 2- 28N Concise; 1- | $31.00 | 07-Oct-2007 | 18 |
| VINTAGE CONCISE CIRCULAR SLIDE RULES W/CASE AN | $29.00 | 22-Oct-2007 | 1 |
| HONEYWELL/MICRO SWITCH Concise Circular Slide | $28.00 | 14-Oct-2007 | 17 |
| "2 3"" Circular Slide Rules 1- 28N Concise; 1 | $26.00 | 14-Oct-2007 | 6 |
| Concise circular slide rule Sama & Etani model | $21.00 | 15-Oct-2007 | 4 |
| Circular Slide Rule CONCISE No. 26 - Hard to F | $20.50 | 08-Oct-2007 | 3 |
| Concise CIRCULAR SLIDE RULE 28N adv Jack Morga | $20.50 | 20-Oct-2007 | 7 |
| "ROUND POCKET SLIDE RULE,CONCISE 600,FRENCH OI | $19.17 | 14-Oct-2007 | 2 |
| VINTAGE CONCISE CIRCULAR SLIDE RULES W/CASE AN | $17.99 | 18-Oct-2007 | 2 |
| Vintage Concise No. 260 Circular Slide Rule | $11.50 | 31-Oct-2007 | 4 |
| SAMA 7 ETANI -1966-CONCISE CIRCULAR SLIDE RULE | $11.19 | 21-Oct-2007 | 7 |
| "CONCISE CIRCULAR SLIDE RULE NO. 28N, CASE, IN | $10.50 | 07-Oct-2007 | 7 |
| Concise Circular Slide Rule w/ Manual | $9.99 | 13-Oct-2007 | 1 |
| CONCISE Circular Slide Rule No. 300 Made in Ja | $9.99 | 13-Oct-2007 | 1 |
| Concise Circular Slide Rule No. 26A - Japan -T | $9.99 | 08-Oct-2007 | 1 |
| 1960 Concise Circular slide rule 552 Dupont Ad | $6.90 | 18-Oct-2007 | 3 |
| CONCISE CIRCULAR SLIDE RULE # 28 | $5.50 | 09-Oct-2007 | 2 |
| Concise 28N Circular Slide Rule Instruction Ma | $3.99 | 15-Oct-2007 | 0 |