You might want to scan the serotta.com forum. I see some nice high end bicycles going for relatively decent prices compared to the shop.
Still most of those bicycles are over $1000.00. I was fortunate to get a 1979 Raleigh team professional with full campagnolo for under $700.00
on the serotta forum about a 1 year ago. If you are in the Washinton DC area, they are having a really great Bicycle swap meet up in Leesburg, Va.
Its called Classic Rendezvous. Check out their forum as well. Lots of older bike aficianados there. If you put out a feeler there you will probably hear from 2-3 people within 24 hours.

Later ,
Andrew