Other links of interest:
HotWheelsCollectors.com – Mattel’s own Hot Wheels site features forums, online shop and more.
Online Redline Guide -Outstanding site dealing with the history, variations and collection of early Redline Hot Wheels. Careful…it’s seriously addictive!
The Toy Peddler -Online classified site specializing in diecast / toy items
South Texas Diecast Hot Wheels Guide -The “go to” reference for most every Hot Wheels casting. Includes tons of great photos and even a pictorial “wheel” guide.