Someone I know built a bike from parts mostly ordered online, and ended up somewhere around $2,000 invested (and that's a track bike.)
Here's one in the 'burbs Feb 11:
The Chicago Bike Swap (presented by Active Trans and Bike Winter) is going to be Feb. 26.
I need to update this listing to reflect the new name:
It should be at least as big as the Harper College swap, and there will be beer. Real beer.
There are a few others presented by school bike orgs and such but I don't have time to search right now.