It's heavily modified, though not all of it is bad. The steering wheel and shift ball are the worst bits, followed by the hood with the extra power bulge. They are bad because they are tacky-looking, not because they impact performance. Still, those three items will have to go and getting rid of the hood won't be cheap. Assuming the thing drives well, though, it's a good price for what the car is. It has less miles than mine! And it's cleaner! The engine was built by a reputable shop within the Corvette community, so this isn't "somebody else's project car." This thing will haul ass.
Definitely not DD material.
If that doesn't float your boat, there's also this ZR-1 with a significantly less impressive - but still good - price of $16,000.