I bought a random piano for $250 (US$140ish) a few months ago. All the keys work!
It was so out of tune, the tuner said that to wrench it all the way back into concert pitch in one go would warp the insides. So its now in perfect tune with itself.... a semitone and a bit flatter than all my guitars... oh well, I only have to wait for what, six years?
I'm having great fun tho, wish I'd got one years ago now.