I comb the thrift stores, man. You won't find what you're looking for when you're looking for it, but you'll find 20 others you didn't know you couldn't live without. The prices can't be beat, and you obviously have to check the condition, but I find stuff I won't go home without all the time. Just my 2 cents worth. If I can keep an eye out for anything specific for you, let me know.
Dan