| Concise |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Dec-2007 |
| Babcock and Wilcox B&W Concise Circular Slide | $54.00 | 03-Dec-2007 | 11 |
| "Vintage Concise Circular Slide Rule 28N, Case | $46.00 | 09-Dec-2007 | 6 |
| 3 Vintage Concise Circular Slide Rule 280 + fr | $31.99 | 20-Dec-2007 | 3 |
| Circular Slide Rule Concise CTCS-552 Sama & Et | $31.00 | 19-Dec-2007 | 7 |
| CONCISE CIRCULAR SLIDE RULE from Stein-Hall Lt | $22.49 | 18-Dec-2007 | 5 |
| Takeda Concise Circular Slide Rule Really Cool | $20.01 | 09-Dec-2007 | 8 |
| Vintage Circular Slide Rule Concise # 28 N Jap | $19.99 | 02-Dec-2007 | 1 |
| Babcock and Wilcox B&W Concise Circular Slide | $17.49 | 14-Dec-2007 | 6 |
| Vintage Dana Concise Circular Round Slide Rule | $15.50 | 19-Dec-2007 | 4 |
| Concise 28N circular slide rule w/ case + manu | $15.00 | 28-Dec-2007 | 1 |
| Key Line's CONCISE CIRCULAR SLIDE RULE_Pouch & | $13.00 | 06-Dec-2007 | 4 |
| CONCISE CIRCULAR SLIDE RULE WITH HOLDER | $10.51 | 19-Dec-2007 | 3 |
| Vintage 1966 Concise Circular Slide Rule Model | $9.95 | 02-Dec-2007 | 1 |
| Vintage Cutler Hammer Concise Circular Slide R | $8.49 | 19-Dec-2007 | 3 |
| Circular Slide Rule - Concise 28 | $3.50 | 09-Dec-2007 | 1 |