| Concise |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Feb-2008 |
| SIC / Concise Model 300-B Circular Slide Rule | $67.00 | 19-Feb-2008 | 8 |
| "GRAMMERCY 4"" CIRCULAR SLIDE RULE BY CONCISE" | $26.52 | 16-Feb-2008 | 8 |
| RARE Concise #260 300 Circular Slide Rule Case | $22.48 | 06-Feb-2008 | 3 |
| CONCISE CIRCULAR SLIDE RULE & SCIENCE TABLES 6 | $20.50 | 02-Feb-2008 | 4 |
| VINTAGE CONCISE CIRCULAR SLIDE RULE W/ MANUAL | $20.50 | 10-Feb-2008 | 9 |
| Old BA Circular Concise Pocket Slide Rule w Ca | $18.27 | 06-Feb-2008 | 7 |
| "Slide Rule Concise 2"" w/ Conversion Tables I | $17.50 | 27-Feb-2008 | 6 |
| CONCISE CIRCULAR SLIDE RULE | $16.50 | 26-Feb-2008 | 9 |
| "Concise Number 28N 3-1/4"" Circular Slide Rul | $16.01 | 18-Feb-2008 | 7 |
| NICE CONCISE CIRCULAR SLIDE RULE | $15.50 | 19-Feb-2008 | 4 |
| Vintage Concise 4 inch Circular Slide Rule 196 | $14.84 | 06-Feb-2008 | 5 |
| Concise Circular Slide Rule Conversion Tables | $13.95 | 28-Feb-2008 | 3 |
| "Concise Number 28N 3-1/4"" Circular Slide Rul | $13.50 | 01-Feb-2008 | 4 |
| Concise Circular Slide Rule ALVIN NO. CS206 | $11.50 | 25-Feb-2008 | 2 |
| "Circular Concise Slide Rule # 28, with case & | $11.50 | 04-Feb-2008 | 2 |
| CIRCULAR SLIDE RULE BY CONCISE WITH CONVERSION | $10.50 | 16-Feb-2008 | 3 |
| VINTAGE CONCISE CIRCULAR SLIDE RULE GREAT COND | $10.26 | 10-Feb-2008 | 3 |
| "Concise Number 28N 3-1/4"" Circular Slide Rul | $8.61 | 08-Feb-2008 | 6 |
| "Concise circular slide rule, Photocircuits Co | $6.50 | 20-Feb-2008 | 5 |
| "4-Slide Rules, Round Concise, Sterling, Lawre | $6.00 | 24-Feb-2008 | 1 |
| Concise Circular slide ruler No. 28N | $5.00 | 28-Feb-2008 | 3 |
| Concise circular slide rule Type-E 28N case an | $3.24 | 02-Feb-2008 | 3 |
| NEW Sama Etani Concise circular Slide Rule Mod | $59.95 | 17-Feb-2008 | 0 |
| NEW Sama Etani Concise circular Slide Rule Mod | $59.95 | 29-Feb-2008 | 0 |
| "NICE CONCISE CIRCULAR SLIDE RULE, 3 DAY AUCTI | $9.95 | 10-Feb-2008 | 0 |