Charlie, go with your gut. Wrinkles in the skin, particularly around the landing gear are bad news, and particularly when you go to sell. If you spotted it, the new buyer will also, or you ought to tell him.
On the other side of the coin, if the damage occured at the time of the wreck that is 30 years ago so there is plenty of time in service. However, you don't know for sure.
Still, I would keep looking.
Geo.
