I wouldn't offer him $350 for a used Winchester Model 70 unless it was a pre-64 action (or Classic), which it's not. Since he's a friend, I'd maybe offer him $250 and negotiate from there (the bad word filter won't let me use the word d-i-c-k-e-r ). If you're going to the range with him, see if he'll throw a scope on it so you can see what kind of groups it'll shoot before you make an offer.

Mike