| Concise |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Apr-2005 |
| Sama & Etani Model 600 Concise Circular Slide | $37.98 | 18-Apr-2005 | 6 |
| "NEW CONCISE 3"" CIRCULAR SLIDE RULE, MODEL 28 | $26.50 | 06-Apr-2005 | 17 |
| "Two Slide Rules, One SIC, One Concise" | $26.00 | 02-Apr-2005 | 7 |
| Sama & Etani Concise EE-112 Slide Rule w/ Nomo | $23.26 | 19-Apr-2005 | 6 |
| Concise Circular Slide Rule Model 270 | $20.52 | 28-Apr-2005 | 7 |
| Pocket Circular CONCISE Slide Rule | $17.00 | 26-Apr-2005 | 5 |
| Old Circular Slide Rule Concise No 270 | $15.01 | 24-Apr-2005 | 4 |
| "~CONCISE CIRCULAR SLIDE RULE, ""GRAMERCY"" w/ | $15.00 | 13-Apr-2005 | 1 |
| """Concise #28"" Circular Slide Rule (Complete | $14.50 | 25-Apr-2005 | 5 |
| "Tiny Concise 2"" Circular Slide Rule w Case I | $11.02 | 25-Apr-2005 | 2 |
| CONCISE CIRCULAR SLIDE RULE sliderule GATES | $9.99 | 05-Apr-2005 | 1 |
| "Vintage CONCISE 3"" CIRCULAR SLIDE RULE, MODE | $9.99 | 18-Apr-2005 | 1 |
| Vintage Concise Circular Slide Rule # 28N w/ C | $6.50 | 15-Apr-2005 | 8 |
| CONCISE CIRCULAR SLIDE RULE-CATERPILLAR- NO.27 | $5.99 | 16-Apr-2005 | 1 |
| "~CONCISE CIRCULAR SLIDE RULE, ""GRAMERCY"" w/ | $20.00 | 06-Apr-2005 | 0 |