Most I've shelled out for a vintage bike is my 1991 Klein Quantum and that was a little over 2 years ago. Definitely well worth the $400 asking price. Got it from the original owner who bought it new in San Francisco. He'd put a ton of miles on it but took extremely good care of the bike so it didn't need any major repairs. Changed a few things to suit my riding style but that's it. Stem has a reproduction Salsa sticker on it at this point. Original wheelset it back on it now too, the ones in this photo were terrible (old, high mileage and abused meant I kept breaking spokes).
