".....Bores are far from perfect but I would shoot this with light loads......" = CODE WORD: junk barrels

Easy for seller to say, he's not potentially losing his left arm or face. Even if reamed out and honed to decent shape you aren't going to know if the barrel wall will be thick enough until you have already paid good money.

ADVISE: Turn and (as Monty Pythons said): run away, run away......
- Mike