| Concise |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Apr-2007 |
| SIC / Concise Model 300-B Circular Slide Rule | $87.10 | 04-Apr-2007 | 9 |
| 1968 Concise Science Tables Circular Slide Rul | $61.00 | 22-Apr-2007 | 15 |
| Assortment of four (4) Concise Circular Slide | $52.01 | 03-Apr-2007 | 5 |
| "1968 CONCISE CIRCULAR SLIDE RULE, Sama & Etan | $41.45 | 09-Apr-2007 | 19 |
| rare circular slide rule CONCISE BELL HELICOPT | $23.50 | 21-Apr-2007 | 5 |
| "CONCISE CIRCULAR SLIDE RULE, Sama & Etani, Mo | $20.50 | 27-Apr-2007 | 5 |
| Mint Pan Am Concise #28 Circular Slide Rule | $20.03 | 14-Apr-2007 | 5 |
| Concise No. 32 Slide Rule and Calendar | $18.05 | 19-Apr-2007 | 4 |
| Concise No. 28 N Circular Slide Rule with Case | $15.50 | 13-Apr-2007 | 13 |
| "1960 CONCISE CIRCULAR SLIDE RULE, MODEL CTCS- | $13.52 | 08-Apr-2007 | 3 |
| CONCISE NO 300 & 28 SLIDE RULE TOOL CASE DRAFT | $12.50 | 02-Apr-2007 | 5 |
| Honeywell's Dialatrol Concise Line Circular Sl | $10.49 | 09-Apr-2007 | 2 |
| Vintage Motorola Labeled Concise Circular Slid | $9.99 | 11-Apr-2007 | 1 |
| Concise RANGE CALCULATOR Circular SlideRule SO | $9.19 | 24-Apr-2007 | 2 |
| "Concise Circular Slide Rule 28N,conversion ta | $8.45 | 17-Apr-2007 | 3 |
| NEW CONCISE No. 28 CIRCULAR SLIDE RULE STILL W | $7.00 | 18-Apr-2007 | 12 |
| concise circular slide rule no.28 number no. 2 | $5.00 | 23-Apr-2007 | 1 |
| Vintage Concise No 28 Circular Slide Rule 40 Y | $14.99 | 10-Apr-2007 | 0 |