| Concise |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Jan-2005 |
| CONCISE NO 380 CIRCULAR SLIDE RULE MINT | $103.50 | 16-Jan-2005 | 10 |
| "4 Vintage ""Concise Circular Slide Rules"" ma | $47.00 | 21-Jan-2005 | 7 |
| Concise 300 Circular Slide Rule Mint | $37.52 | 09-Jan-2005 | 11 |
| Concise circular slide rule w/case + instr | $23.01 | 14-Jan-2005 | 2 |
| CONCISE CIRCULAR SLIDE RULE--W/INSTRUCTION BOO | $19.00 | 08-Jan-2005 | 5 |
| Vintage Concise Circular Slide Rule No.28 With | $18.99 | 06-Jan-2005 | 1 |
| Concise #28N Slide Rule with Case and Instruct | $18.00 | 17-Jan-2005 | 1 |
| CONCISE CIRCULAR SLIDE RULE | $17.00 | 22-Jan-2005 | 2 |
| Concise Circular Slide Rule | $16.00 | 18-Jan-2005 | 6 |
| Monsanto Chemistry Concise Round Slide Rule W/ | $12.50 | 17-Jan-2005 | 1 |
| 1966 DOW CORNING CONCISE CIRCULAR SLIDE RULE E | $8.00 | 10-Jan-2005 | 3 |
| CONCISE Circular Slide Rule & Science Tables | $49.99 | 03-Jan-2005 | 0 |
| CONCISE Circular Slide Rule & Science Tables | $44.99 | 03-Jan-2005 | 0 |
| CONCISE Circular Slide Rule & Science Tables K | $24.99 | 16-Jan-2005 | 0 |
| CONCISE Circular Slide Rule & Science Tables S | $24.99 | 16-Jan-2005 | 0 |
| Concise circular slide rule w/case + instr | $24.99 | 07-Jan-2005 | 0 |
| Concise circular slide rule w/case + instr | $19.99 | 15-Jan-2005 | 0 |
| Concise circular slide rule w/case + instr | $19.99 | 21-Jan-2005 | 0 |
| MICRO SWITCH/HONEYWELL/CONCISE CIRCULAR SLIDE | $9.99 | 10-Jan-2005 | 0 |
| old CONCISE Circular Slide Rule w/Conv Tables | $6.95 | 18-Jan-2005 | 0 |