If the wheels had been kerbed, or otherwise damaged, by the car's first owner, they may well have been refurbed by the dealer. They are never overly concerned at kerbing on px cars, as the repair guys they use can do a pretty good job. As you don't know the full history of the car, in this respect, you may be in a difficult position.
VW wheels are not the best. No excuse for the way they all corrode with the least provocation.