The second annual Techno-Swap-Fest is on the 19 of February, at the National Electronics Museum in Linthicum MD (Near Boston.)
Here is the web site: https://sites.google.com/site/technoswapfest2/
I went last year, had a awesome time, got good deals (Propeller Proto board for $10, etc) and met some cool people. If you are even remotely in the area I suggest you go.
P.S. Last year the prize for least useful item was a copy of the Window Vista Beta...