| Concise |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Jun-2004 |
| Concise 600-ST Circular Slide Rule with Scienc | $29.40 | 10-Jun-2004 | 7 |
| Vintage Concise Brand Circular Slide Rule (MIN | $26.00 | 18-Jun-2004 | 8 |
| Concise Model CTCS-552 circular slide rule | $20.50 | 05-Jun-2004 | 4 |
| SAMA & ETANI INC / CONCISE ROUND SLIDE RULE RE | $18.77 | 17-Jun-2004 | 11 |
| Vintage Concise Circular Slide Ruler by Sama & | $17.50 | 29-Jun-2004 | 11 |
| Concise Circular Slide Rule 28 NEW w Instructi | $10.52 | 12-Jun-2004 | 4 |
| CONCISE CIRCULAR SLIDE SLIDE RULE CASE PAMPHLE | $9.99 | 28-Jun-2004 | 1 |
| VINTAGE KOMAREK-GREAVES CONCISE CIRCULAR SLIDE | $9.77 | 04-Jun-2004 | 12 |
| CIRCULAR CONCISE SLIDE RULE No. 28 W/CASE+ min | $8.49 | 29-Jun-2004 | 2 |
| Vintage Concise Circular Slide Rule - Central | $4.99 | 16-Jun-2004 | 1 |
| CONCISE NO 32 KEY CHAIN ROUND SLIDE RULE CALEN | $3.00 | 30-Jun-2004 | 1 |
| japanese circulal slide rule CONCISE 28N | $9.99 | 20-Jun-2004 | 0 |
| Concise model 28 round slide rule | $5.00 | 06-Jun-2004 | 0 |
| "CONCISE 3"" CIRCULAR SLIDE RULE, MODEL 28N, N | $3.00 | 27-Jun-2004 | 0 |