Hard to go wrong with a good .30-30. The price is a little high, but not horrific. Is he tossing in ammunition?

And performance is a big jump. For things like a charging bull or an engine block, I'd prefer a 12ga slug, but the .30-30 gives you less recoil, greater range, accuracy, lighter ammo weight, and more cost efficent ammo. Ballistically, .30-30 and 7.62x39mm are nearly identical- a hundred million AK and SKS users can't all be wrong. :P