Whats the best deal you have ever gotten?

Was cruising Ebag and found a listing with major spelling errors. It said something like Hollye heads with eldebrook cover. It turned out to be an Edelbrock 750 on a BBC Holley intake. I won the auction for $25 and paid another $20 shipping. Traded the intake for a Weiand dual plane for a B engine and that is the setup on my 72 Charger now..... Didn't even need to kit the carb.