I wouldn't do it. You don't know how the gun was treated. Just not worth the risk on a defensive firearm.
Fully inspecting the weapon and its parts before purchasing as well as demanding a return guarentee is not unreasonable. A modicum of due diligence on the part of the purchaser reduces that risk to a minimum.
NRA Life Member (2003)
I think that one of the notions common to the anti-gunner is the idea that being a victim is 'noble'; as if it is better to be noble in your suffering than disruptive in your own defense.