| Concise |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Apr-2008 |
| Sama & Etani Concise Science & Circ. Slide Rul | $52.51 | 24-Apr-2008 | 14 |
| VINTAGE CONCISE CIRCULAR SLIDE RULE NO 320 MIN | $51.00 | 06-Apr-2008 | 14 |
| Sama & Etani Concise Science & Circ. Slide Rul | $42.00 | 24-Apr-2008 | 9 |
| Circular Slide Rule Concise No. 270 Micronta | $41.10 | 21-Apr-2008 | 11 |
| CONCISE SCI TABLES & CIRCULAR SLIDE RULE SAMA | $39.98 | 17-Apr-2008 | 12 |
| CONCISE 380 CIRCULAR SLIDE RULE ALVIN Radio Co | $29.99 | 27-Apr-2008 | 1 |
| Sama & Etani Concise Science & Circ. Slide Rul | $23.50 | 22-Apr-2008 | 4 |
| Vintage Sama & Etani Concise circular slide ru | $22.48 | 05-Apr-2008 | 19 |
| Concise Circular Slide Rule No 28 N case + boo | $22.27 | 27-Apr-2008 | 5 |
| "CONCISE SAMA & ETANI, Inc. slide rule NO RESE | $13.50 | 23-Apr-2008 | 11 |
| OLD CONCISE CIRCULAR SLIDE RULE #28 /JOHNS MAN | $13.50 | 27-Apr-2008 | 4 |
| "Concise Number 28N 3-1/4"" Circular Slide Rul | $11.50 | 09-Apr-2008 | 6 |
| Vintage Circular Concise Slide Rule #28 W/Case | $11.50 | 18-Apr-2008 | 2 |
| CONCISE CIRCULAR SLIDE RULE & CONVERSION TABLE | $11.50 | 15-Apr-2008 | 2 |
| CONCISE CIRCULAR SLIDE RULE Westinghouse CTCS- | $10.49 | 01-Apr-2008 | 2 |
| Circulair pocket Slide Rule CONCISE No 28 N Ja | $9.99 | 30-Apr-2008 | 1 |
| "Vintage Key Lines ""Concise"" Circular Slide | $9.99 | 08-Apr-2008 | 1 |
| VINTAGE CONCISE CIRCULAR SLIDE RULE #28 MINT W | $9.99 | 27-Apr-2008 | 1 |
| CONCISE CIRCULAR SLIDE RULE White Rodgers #28N | $9.99 | 01-Apr-2008 | 1 |
| """Concise"" Circular Slide Rule (No. 28N)" | $9.95 | 08-Apr-2008 | 1 |
| NEW Sama Etani Concise circular Slide Rule Mod | $59.95 | 24-Apr-2008 | 0 |
| Concise Small Circular Slide Rule - Cute! | $15.00 | 09-Apr-2008 | 0 |
| Circulair pocket Slide Rule CONCISE No 28 N Ja | $9.99 | 10-Apr-2008 | 0 |
| Circulair pocket Slide Rule CONCISE No 28 N Ja | $9.99 | 13-Apr-2008 | 0 |
| "Vintage ""Concise"" Circular Slide Rules Inst | $0.99 | 02-Apr-2008 | 0 |