Most major cities have Insurance Auction lots, and that is where they dispose of the bikes/vehicles claimed to be totalled in wrecks. Remember though, that there are a lot of other people who are in the business of vehicle salvage that are doing the same thing, and if it is cheap, it is "cheap". You are fighting an uphill battle here. Good luck, and maybe you want to go to Craigslist to look, or even post an ad that you are interested in buying wrecked or used bikes.