| Lawrence |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in May-2007 |
| 1946 LAWRENCE LUMBER CALCULATOR WOODEN SLIDE R | $30.69 | 16-May-2007 | 2 |
| Early 1900's LAWRENCE ENGINEERING SLIDE RULE i | $17.49 | 22-May-2007 | 4 |
| Vintage Lawrence Model 10B Slide RUle & Box | $17.02 | 12-May-2007 | 1 |
| VINTAGE SLIDE RULE 10-8 LAWRENCE WITH CASES BO | $13.50 | 29-May-2007 | 2 |
| LAWRENCE LUMBER CALCULATOR SLIDE RULE VINTAGE | $13.25 | 29-May-2007 | 2 |
| Two Lawrence Slide Rules w/boxes booklet Peru | $12.99 | 31-May-2007 | 1 |
| Vintage Slide Rule Lawrence Engineering Servic | $10.00 | 01-May-2007 | 1 |
| Vintage LAWRENCE ENGINEERING WOODEN SLIDE RULE | $9.99 | 31-May-2007 | 1 |
| BOX LOT FOUR (4) VINTAGE SLIDE RULE LAWRENCE M | $9.99 | 20-May-2007 | 1 |
| Vintage Lawrence Engineering Slide Rule with C | $7.50 | 19-May-2007 | 1 |
| VINTAGE LAWRENCE ENGINEERING SLIDE RULE 8-B PA | $5.99 | 10-May-2007 | 1 |
| "Lawrence Engineering Slide Rule Peru, Indiana | $5.49 | 26-May-2007 | 1 |
| VINTAGE LAWRENCE SLIDE RULE INSTRUCTION BOOK 1 | $4.99 | 23-May-2007 | 1 |
| LAWRENCE DELUXE SLIDE RULE | $14.97 | 20-May-2007 | 0 |
| "Lawrence 10"" Slide rule 10 B w/ box" | $9.99 | 27-May-2007 | 0 |
| Z954 Lawrence Engineering Peru Indiana Slide R | $9.99 | 29-May-2007 | 0 |
| Vintage LAWRENCE ENGINEERING WOODEN SLIDE RULE | $9.99 | 21-May-2007 | 0 |
| "Lawrence Eng. Wood Slide Rule In box, 1950s" | $7.99 | 23-May-2007 | 0 |
| "8 INCH WOOD SLIDE RULE, LAWRENCE ENG. SVC., W | $6.99 | 23-May-2007 | 0 |
| 1940s Lawrence Slide Rule in Box Peru. Indiana | $6.99 | 29-May-2007 | 0 |
| VINTAGE LAWRENCE ENGINEERING SLIDE RULE 8-B PA | $5.99 | 04-May-2007 | 0 |
| Vintage Lawrence Slide Rule | $5.99 | 08-May-2007 | 0 |
| VINTAGE LAWRENCE ENGINEERING SERVICE WOOD SLID | $5.99 | 03-May-2007 | 0 |
| 1939 Lawrence Slide Rule Instruction Book | $5.99 | 31-May-2007 | 0 |
| LAWRENCE ENGINEERING SERVICE PERU INDIANA SLID | $5.00 | 31-May-2007 | 0 |
| VINTAGE LAWRENCE SLIDE RULE INSTRUCTION BOOK 1 | $4.99 | 14-May-2007 | 0 |
| #2343-Slide Rule Book Lawrence 1939 | $4.00 | 01-May-2007 | 0 |
| Vintage Slide Rule Lawrence Engineering Servic | $3.99 | 01-May-2007 | 0 |
| "Old 1942 Lawrence 250 BT Slide Rule,Case,Inst | $3.99 | 15-May-2007 | 0 |
| rare LAWRENCE ENGINEERING 10B Wood SLIDE RULE. | $3.00 | 11-May-2007 | 0 |
| Vintage 1939 Lawrence Slide Rule Instruction B | $2.99 | 06-May-2007 | 0 |
| Lawrence Engineering Services Slide Rule | $2.95 | 01-May-2007 | 0 |