If the accuracy is real, the bulged barrel didn't bother me, and I really liked the gun, I'd buy it but not before some price negotiation.
However,,If the damage in the rifle barrel is going to bother you at all in any way,,,then just walk away from the gun. If nothing short of a perfect rifle bore will satisfy you, don't trouble yourself with the gun. It's not worth buying and then trying to figure a way of making it right.