Seems high $ for a rubber-bumper C3 Corvette. Assuming all is good regarding rust and such, one more thing to consider is C3s tend to roast your feet. Sounds trivial but it's not. When I restored mine I heavily insulated the transmission tunnel and diverted an air conditioning duct to blow into the footwell. The C3s can be attractive but they really are not great cars.
My buddy agrees. He paid quite a bit for one and found out quick it was no fun to drive. He got rid of it very quick.
