| Concise |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Jul-2007 |
| DOW Sama Etani Concise circular Slide Rule 552 | $64.95 | 16-Jul-2007 | 1 |
| Sama Etani Concise circular Slide Rule 200EE + | $64.95 | 16-Jul-2007 | 1 |
| SAMA & ETANI CONCISE SCIENCE TABLES CIRCULAR S | $42.00 | 12-Jul-2007 | 16 |
| Concise Circular Slide Rule and Conversion Tab | $27.06 | 12-Jul-2007 | 8 |
| NEW CONCISE No. 28 CIRCULAR SLIDE RULE STILL W | $20.50 | 02-Jul-2007 | 9 |
| E28 Vintage Concise Circular Slide Rule No. 28 | $19.99 | 19-Jul-2007 | 1 |
| Vintage Circular Concise Slide Rule No. 28 | $17.28 | 28-Jul-2007 | 5 |
| NEW CONCISE No 28 CIRCULAR SLIDE RULE ORIGINAL | $16.07 | 24-Jul-2007 | 9 |
| Concise Circular Slide Rule #28 Edogawa-kuToky | $15.50 | 04-Jul-2007 | 2 |
| "Concise Circular Slide Rule~NUPRO CO~Clevelan | $15.50 | 31-Jul-2007 | 10 |
| Millipore Concise Circular Slide Rule | $11.61 | 31-Jul-2007 | 2 |
| CONCISE CIRCULAR SLIDE RULE W/ INSTRUCTIONS LI | $9.99 | 27-Jul-2007 | 1 |
| Vintage CONCISE CIRCULAR SLIDE RULE No. 28N | $9.99 | 01-Jul-2007 | 1 |
| CONCISE Circular SLIDE RULE #28 W/ Case & Inst | $9.95 | 16-Jul-2007 | 1 |
| CONCISE CIRCULAR SLIDE RULE W/ INSTRUCTIONS LI | $8.27 | 29-Jul-2007 | 3 |
| VINTAGE CONCISE CO. LTD. CIRCULAR SLIDE RULE N | $1.75 | 07-Jul-2007 | 3 |