Just a quick question... I know there are good reasons not to buy a used mattress -- possible bedbugs and such -- but what about a used futon? Do the same issues apply? Mine is on its last legs (the frame is broken AND the mattress has gone flat), and I'd like to replace it cheaply... but I certainly don't want to be bringing parasites into my apartment! And along similar lines.. I'd assume that a used sofa is ok, what about a sofa bed? My sister's fiance just bought one (in great condition) from an estate sale... should they be concerned? What are your thoughts?