| Concise |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Mar-2007 |
| CONCISE #28 CIRCULAR SLIDE RULE DuPONT POLYEST | $41.00 | 10-Mar-2007 | 8 |
| Sama & Etani Concise Chemical Table Circular S | $38.25 | 09-Mar-2007 | 7 |
| Circular * CONCISE * Slide Rule No 28N +instru | $27.00 | 01-Mar-2007 | 7 |
| Concise Circular Slide Rule | $26.00 | 19-Mar-2007 | 6 |
| "Concise Circular Slide Rule 28N,conversion ta | $21.50 | 13-Mar-2007 | 15 |
| CONCISE CONVERSION TABLE & CIRCULAR SLIDE RULE | $21.26 | 01-Mar-2007 | 4 |
| CONCISE CIRCULAR SLIDE RULE - Model No. 28N - | $18.50 | 18-Mar-2007 | 5 |
| Concise Circular Slide Rule 28N w/ Case & Manu | $16.01 | 11-Mar-2007 | 3 |
| SLIDE RULE - CIRCULAR #28 by CONCISE | $15.52 | 17-Mar-2007 | 6 |
| CONCISE CIRCULAR SLIDE RULE & LUFKIN SCREW THR | $15.50 | 11-Mar-2007 | 4 |
| L3782 Concise Circular Slide Rule w/ Case & Ma | $13.22 | 24-Mar-2007 | 4 |
| VINTAGE CONCISE CIRCULAR SLIDE RULE No. 28 w/c | $12.39 | 12-Mar-2007 | 5 |
| Concise CTCS-552 Circular Slide Rule w/ Case & | $11.99 | 11-Mar-2007 | 3 |
| """Concise"" Circular Slide Rule No.300 with C | $11.50 | 11-Mar-2007 | 6 |
| Concise Conversion Tables & Slide Rule | $11.50 | 10-Mar-2007 | 6 |
| Concise CTCS-552 Circular Slide Rule w/ Case & | $11.49 | 11-Mar-2007 | 3 |
| "Concise circular slide rule, No 260" | $10.50 | 03-Mar-2007 | 5 |
| CONCISE CIRCULAR SLIDE RULE NO. 300 | $6.50 | 04-Mar-2007 | 3 |
| Concise No. 28 Circular Slide Rule -Case & Ins | $5.50 | 06-Mar-2007 | 2 |
| NEW CONCISE CIRCULAR SLIDE RULE | $5.00 | 18-Mar-2007 | 1 |
| Vintage CONCISE CIRCULAR SLIDE RULE Anderson E | $4.95 | 11-Mar-2007 | 1 |
| Assortment of four (4) Concise Circular Slide | $35.00 | 27-Mar-2007 | 0 |
| "1960 Concise Circular Slide Rule, Sama & Etan | $20.00 | 11-Mar-2007 | 0 |
| VINTAGE CONCISE CIRCULAR SLIDE RULE No. 28 w/c | $9.99 | 03-Mar-2007 | 0 |
| Concise Circular Slide Rule 28N w/ Case & Manu | $9.99 | 11-Mar-2007 | 0 |
| "CONCISE & JEPPESEN Circular Slides Rules LOT, | $9.00 | 25-Mar-2007 | 0 |
| CONCISE NO 300 SLIDE RULE TOOL W/CASE MANUEL J | $4.99 | 11-Mar-2007 | 0 |
| CONCISE NO 28 SLIDE RULE TOOL GATES 1960S W/CA | $3.99 | 11-Mar-2007 | 0 |