How does one sell a Thompson submachine gun? A friend passed away and his wife is selling his gun collection. One is a "USMC 078" Thompson, gold muzzle brake, commemorative model apparently, never fired. I cannot find any listing in the Blue Book of Gun values for a commemorative model. If someone wanted to buy it, I assume one cannot just sell it without going through a FFL holder - or, in fact - in this case, is it even legal to sell?