It is a good price for the car as described.
BUT, for a repaired write off the price should be about 30% less. The Insurance Write Off Marker "SHOULD" be attached to the insurance database, but there are, both legal and illegal, ways to remove the marker.
New side, new chassis and at the right price a good buy - as long as the work was done by a bodyshop who understands coachwork. A superficial repair, bent chassis and removed write off marker means that the car is , IMHO, worthless.
These people are everywhere, did anyone watch Rogue Traders yesterday and in particular the feature on Puppy Farming??
