Luck of the draw.
New ones on offer every so often at Hobbythek or RC Pitstop, else check out Ebay.
Always a risk unless you're buying one you know - might get a good'un, might get a whole heap of trouble as they grip-roll very easily - good fun - but they may have taken a BIG hit.
Before I started chilling a little, I had a BIG tumble in front of Hyperpete and Pablo at Calderstones - totalled my steering servo and bent the front - got off lightly.
Having said that, they take a hell of a lot of big hits before anything really bad happens.
MIGHT find something for £250-300. Normally around £400-600 for good used. You'll see a few around £700+ but it's probably someone like me (never selling mine!!!) who's spent a fair wedge on hop-ups.
Pot luck m8.
Good luck as well.
Whatever you get, you always want to 'make it yours' and change something!!
Al.