| Concise |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in Feb-2005 |
| Sama & Etani Concise Circular Slide Rule Perio | $50.00 | 25-Feb-2005 | 6 |
| SIC / Concise Model 300-B Circular Slide Rule | $42.00 | 28-Feb-2005 | 15 |
| Sama & Etani Concise 600 Circular Slide Rule! | $40.00 | 15-Feb-2005 | 1 |
| Concise circular slide rule w/case + instr | $28.00 | 18-Feb-2005 | 8 |
| Sama & Etani Concise EE-112 Slide Rule w/ Nomo | $26.71 | 21-Feb-2005 | 5 |
| Concise #28N circular slide rule w/case + inst | $26.00 | 05-Feb-2005 | 3 |
| CONCISE 320 Circular Slide Rule + pouch + book | $25.00 | 21-Feb-2005 | 4 |
| Concise circular slide rule -smallest I've see | $23.50 | 13-Feb-2005 | 4 |
| "SAMA & ETANI CIRCULAR SLIDE RULE, CONCISE MOD | $22.01 | 27-Feb-2005 | 4 |
| Slide Rule - Concise Circular Slide Rule - Mon | $21.51 | 26-Feb-2005 | 4 |
| Concise circular slide rule -smallest I've see | $21.03 | 18-Feb-2005 | 5 |
| Concise #28N circular slide rule w/case + inst | $20.00 | 07-Feb-2005 | 1 |
| Concise # 28 circular slide rule w/case + inst | $19.99 | 04-Feb-2005 | 1 |
| Concise #28N circular slide rule w/case + inst | $18.00 | 17-Feb-2005 | 1 |
| Concise circular slide rule -smallest I've see | $18.00 | 14-Feb-2005 | 2 |
| Old Concise #28 Circular Slide Rule Peruvian T | $17.51 | 27-Feb-2005 | 3 |
| GULF OIL - ALPHA CIRCULAR SLIDE RULE - CONCISE | $17.50 | 16-Feb-2005 | 8 |
| Garrett circular slide rule Concise | $17.50 | 07-Feb-2005 | 6 |
| VINTAGE CONCISE CIRCULAR SLIDE RULE NO. 28 | $15.95 | 25-Feb-2005 | 2 |
| Concise Circular Slide Rule with Conversion Ta | $15.25 | 13-Feb-2005 | 7 |
| "CONCISE 3"" CIRCULAR SLIDE RULE, MODEL 28N, N | $14.50 | 03-Feb-2005 | 8 |
| CONCISE CIRCULAR SLIDE RULE NO 28 FMC CORPORAT | $14.02 | 06-Feb-2005 | 5 |
| CONCISE #32 Calculator/Circular Slide Rule | $13.00 | 21-Feb-2005 | 2 |
| Concise Circular Slide Rule #28 with Case | $11.55 | 06-Feb-2005 | 5 |
| 1966 Concise Circular Slide Rule & Case NFPA T | $11.54 | 13-Feb-2005 | 6 |
| 1968 Concise Science Tables Circular Slide Rul | $11.50 | 21-Feb-2005 | 3 |
| Concise #28 Circular Slide Rule from Vickers H | $11.00 | 13-Feb-2005 | 3 |
| CONCISE CIRCULAR #28 SLIDE RULE W/INSTRUCTIONS | $10.50 | 24-Feb-2005 | 4 |
| CONCISE 28 Circular Slide Rule + pouch + bookl | $10.00 | 21-Feb-2005 | 1 |
| CONCISE CIRCULAR SLIDE RULE sliderule GATES | $9.99 | 02-Feb-2005 | 1 |
| Concise Circular Slide Rule No. 28 Denver Equi | $9.99 | 28-Feb-2005 | 1 |
| Concise Circular Slide Rule or Ruler with Case | $9.99 | 28-Feb-2005 | 2 |
| CONCISE SLIDE RULE RULER ROUND ELEMENT TABLE & | $7.00 | 21-Feb-2005 | 4 |
| Esso Concise Takeda Circular Slide Rule | $3.99 | 13-Feb-2005 | 1 |
| Concise circular slide rule -smallest I've see | $20.00 | 11-Feb-2005 | 0 |
| Concise circular slide rule w/case + instr | $20.00 | 11-Feb-2005 | 0 |
| Concise #28N circular slide rule w/case + inst | $20.00 | 04-Feb-2005 | 0 |