The prices on these things are going throught the roof. People see them sell for 100-500k on BJ, so they pass the savings on to everyone else. If anything they are a very sound investment, you won't loose money on it like some brand x'ers. Unrestored they go from 3-5k to 10-15k depending on model. The big block cars are getting the premiem. Mopar Collectors guide is a good source for finding them in all kinds of condition.

And I may be premature but I'm calling BS on your buddies silver Challenger. Prob his dads/uncle/brother or neighbor, but not his. You don't buy a car like that and not have any details on it or know if its the real thing or not. Still a very nice find, I really like it.