Try to find out as much about the circumstances as you can, how was it stolen, why (joy riders, for re-sale?) how it was recovered, what damage was done, what repairs were made, by whom etc. Who is selling it, how they acquired it, check its status/category on the accident damaged register (however, I think even HPI may not have a record of this yet if it was very recent). End of the day, if you are confortable, the price is right and you know what you are getting into (and how hard it may be to get out of!)....