Try
Craigslist look in both cars/trucks and autoparts. Excellent source for cars. In fact, it is great source for "project" cars. IE cars that need repair but other wise have a good title. Avoids the stimga of having a salvage title.
car-part.com a searchable list of salvage yards. Better for getting specific parts.
Copart.com. Allows individuals to bid on whole salvage cars.
IMO, ebay is not as good. Too many dealers.
I have purchased 3 "project" cars for fixup. 1 from ebay and 2 from Craigslist. IMO, Craigslist is better because you can see what is being bought without the BS of bidding. Deal directly with the seller.
What is it you are trying to do?