I found a full 5-speaker set of Vienna Acoustics speakers in my local pawn shop for $1200 "asking price". It included a pair of floor standing mains, a generous center and two stand mount. The big ones were "Beethoven", don't recall the others but seemed they were willing to come down a LOT "if you're serious." I wasn't.
They had a lot of other common speakers too, mainly Klipsch, Polk, Bic and Infinity. On the local Craigslist I find a lot of folks dragging out the old AR, Advent and JBL speakers hoping to get 5 to 10 times what they actually worth.