I went the last time they did it in Leesburg, VA. I just went for the last day, which was the bike show and swap meet. I sold a few saddles, had a good time meeting people, and tried very hard not to buy anything. In the end someone persuaded me to pay $50 for a Campy NR headset that came with a frame and fork -- an undrewed Holdsworth 531 Special in desperate need of paint.
I guess it was a pretty good purchase....
