Here in Portland we have a couple of surplus electronics shops
Surplus gizmos is probably the largest
Has a lot of connectors and switches and occasionally a few single cool items
Cascade surplus is on the other side of town from me and I haven't been there since they moved even further away. Somebody else will have to comment on them, before they moved I can't remember much more than old relics and lots of transformers.
I haven't seen anyone mention Hamfests we have several good ones in the pacific northwest. Next weekend is a really big one in Washington, when I say really big its really big. I usually get a couple of tables and my daughter sells stuff while I bring other peoples stuff back so my truck maintains its proper ballast.
And in June is another one here in Oregon
There are hamfests all over, you can look up many of them on http://www.arrl.com
These are basically flea markets for electronics and you can find all sorts of strange and wonderful stuff to take up space.
Hope someone finds these links useful