Buying and selling guns sight unseen may be summed up in the phrase "caveat emptor." The investment in a gunsmith's time or proper gauges and tools pays off quickly. POI and MOI can be measured just as effectively as chokes. If the state of the internal machinery is in question, have the inspection done by a gunsmith insured for such looks. Until the buyer and seller know each other well, the probability of damage to the piece dictates the policies commonly seen. As gun prices rise, it makes sense to protect inventory. If I know the gun hasn't been shot or taken apart, then the shipping insurance is valid as well.
