- Kovels Online Price Guide
Auto parts and accessories are collectors items today. Gas pump globes and license plates are part of this specialty. Prices are determined by age, rarity, and condition. Signs and packaging related to automobiles may also be found in the Advertising category.
- Oldgas.com Shop Talk Search
Search through thousands of topics posted on the Oldgas.com discussion forum. For sale items, value opinions, authenticity and more discussed on archived and current forum discussions. Also try the Google-based internal search form for Oldgas.com at the bottom of this page.
- PCM Publishing Research
Historical research regarding petroleum marketing or petroleum collectibles Each project is unique Contact us for more information
- The 10,000-Year Calendar
Create a calendar for any month in any year 1 - 10000 A.D. Useful for researching the past or planning for the future.
Patent Office Issue Years and Patent Numbers
Table of issue years and patent numbers, for patents issued since 1836. Look up a patent number and find the year it was granted. Great for antique research.
Online price data research tool. Live auction, Proxibid and eBay auction results are searchble for values.