A restamp is a restamp. If I have follow a few things correctly then a factory restamp is a ground off incorrect stamp and restamped not a DECK and restamp, just the pad is ground off. Not a favorable situation but if verified/documented it is what it is. As far as I decked it and stamp it back exactly as it was..............................right. Only with time stamped photography (which can be faked to a degree) would I even begin to buy that line. "Well why would I lie?" about 10,000 reasons. Not saying the seller isn't telling the truth, just cant be 100% sure, much less the next guy and the next, "well the guy I bought it from said he stamped it back exactly". Unfornately too much money riding on it to take a chance. If you like a car and like a price then buy it, if you are paying a premium for things like options, trim levels and number then verify them BEYOND ANY question.
Kinda like an engine or tranny you cant see work/check the vituals/inspect, just assume it's a core and pay accordingly.