when i bought the car i hpi'd it and it was registered stolen recovered.
it was clear that the car had had some repairs in certain areas but it was a cheap,standard rs500 with sensible miles.
upon purchase and proper inspection it turned out that the floor number(correctly stamped) had been cut out of another shell and placed in place under the carpet in a way you couldnt really tell without removing the carpet.
more inspections found a repair(half decent) in the n/s/f and a pillar section.
even more inspections founs the boot floor had been tack welded in place so that was sorted out.
at the end of the day it is an rs500(if he has kept the original rs500 bottom end as the big power engine is on a 200 block),so it will always have value,but will always be bottom end rs500 money-whatever that is.......sadly it seems to have gained full service history that it didnt have when i owned it-unless it did turn up from the past,but i couldnt find it when i had it.
so,it has been re-shelled and that shell has been damaged/repaired.
it was a very quick car though!