You gotta keep lookin man. Around here guys post up new ads with karts for sale every day, the true bargains usually get snapped up within an hour or so of being posted. (I've missed out on serveral deals by just a few minutes myself :ninja:
You seem to be in a good market there, I'll bet if you kept preformed c-l searches using those 4 different go kart spellings I linked, several times every day, you'll find someone unloading a cool $1000 kart for just a few hundred bucks.