| Lawrence |
| Description | Price | Date | Bids |
Prices of slide rules sold on ebay (the internet auction) in May-2008 |
| 1939 LAWRENCE SECRET CODE MAKER SLIDE RULE #C6 | $31.00 | 27-May-2008 | 8 |
| Vint Wood Slide Rule Lawrence Engineering w/Di | $11.49 | 10-May-2008 | 3 |
| Vintage Wood Slide Rule Lawrence Engineering | $10.50 | 11-May-2008 | 4 |
| Vintage Lawrence Student Slide Ruler - Rare Ol | $10.00 | 23-May-2008 | 1 |
| Lawrence slide rule | $10.00 | 10-May-2008 | 1 |
| "2 SLIDE RULES LAWRENCE 10B, ACU-MATH A-51, DR | $9.99 | 23-May-2008 | 1 |
| Old Wooden Slide Rule by Lawrence Engineering | $9.99 | 06-May-2008 | 2 |
| LAWRENCE 10B SLIDE RULE & INSTRUCTION HB BOOK | $7.99 | 29-May-2008 | 1 |
| LAWRENCE SLIDE RULE 10-B MADE IN THE USA | $7.99 | 17-May-2008 | 1 |
| Old Wood Ruler LAWRENCE ENGINEERING SLIDE RULE | $5.50 | 08-May-2008 | 3 |
| ANTIQUE LAWRENCE DELUXE 10-B SLIDE RULE RULER | $4.99 | 22-May-2008 | 1 |
| Old Lawrence 10-B Slide Rule in Sleeve | $4.81 | 13-May-2008 | 2 |
| 1939 Lawrence slide rule instruction booket 28 | $2.99 | 25-May-2008 | 1 |
| "Antique Slide Rule, Made by Lawrence Eng. Ser | $2.99 | 10-May-2008 | 1 |
| Vintage Wood Slide Rule Lawrence DeLuxe Engine | $0.99 | 30-May-2008 | 1 |
| VINTAGE LAWRENCE DELUXE SLIDE RULE W/ CARDBOAR | $0.99 | 20-May-2008 | 1 |
| Vintage Lawrence Student Slide Ruler - Rare Ol | $15.00 | 21-May-2008 | 0 |
| General Electric Slide Rule - Lawrence Enginee | $14.99 | 19-May-2008 | 0 |
| Old Vintage Lawrence Engineering Wood Slide Ru | $9.99 | 09-May-2008 | 0 |
| "VINTAGE SLIDE RULE LAWRENCE ENGINEERING PERU, | $9.99 | 12-May-2008 | 0 |
| ANTIQUE LAWRENCE DELUXE 10-B SLIDE RULE RULER | $9.97 | 29-May-2008 | 0 |
| LAWRENCE WOOD SLIDE RULE 10-B WITH CASE MADE I | $7.99 | 25-May-2008 | 0 |
| "VINTAGE SLIDE RULE LAWRENCE ENGINEERING PERU, | $7.50 | 24-May-2008 | 0 |
| Old Lawrence Deluxe Slide Rule in Box w/ instr | $5.99 | 25-May-2008 | 0 |
| "Lawrence Slide Rule Engineer Ruler Made Peru, | $5.25 | 01-May-2008 | 0 |
| "Lawrence Slide Rule Engineer Ruler Made Peru, | $5.25 | 21-May-2008 | 0 |
| Old Lawrence Wood Slide Rule w/ Case | $4.99 | 25-May-2008 | 0 |
| "Wooden Slide Rule, Lawrence Engineering Wabas | $4.00 | 10-May-2008 | 0 |
| Vintage Lawrence Slide Rule | $2.99 | 19-May-2008 | 0 |
| Vintage 1939 Lawrence Slide Rule Instruction B | $2.00 | 21-May-2008 | 0 |
| 1936 Lawrence Slide Rule Instruction Book L@@K | $1.99 | 16-May-2008 | 0 |