future value of classic performance cars,when to bail out, before the crash?

Barret Jackson, you really cannot go by what these cars sell for. You need to see them in person. My friend certified inspector (not sure what you call it), Big name collectors hire him, fly him out there (and back) pay for his whole weekend and his time to inspect and bid on cars. He said there was not a lot nice cars (original ones), thats why we did not see high bids. So its hard to judge value from watching it on TV when you cannot see the car for real.