That's pretty amazing that it looks so good! I was expecting the shooter lane at least to be blown out and it doesn't look bad either. They must clean and wax pretty regularly. If it was a premium, I bet the upper playfield would be pretty much worn out and needing replacement at this point.
Personally I wouldn't buy something with that many plays simply because there are so many un-routed games out there, but this might represent a bargain at some point for someone looking for a good player's machine.