Guns he can use . . . I think the best values, in terms of guns one can use without recourse to anything except off the shelf ammo, would be in guns made since WWII. I'd put the Japanese doubles (Ithaca SKB, Browning BSS, Charles Daly made by Miroku) at or near the top of the list. They're sort of American, in the sense that they were marketed (albeit not made) by American gun companies or importers. From the Italians, Berettas and Bernardellis. From the Germans, post-war Sauers, Simsons, and Merkels. Those are probably the most often encountered post-WWII side by sides that are solid performers and reasonably priced. I've avoided the Spaniards, which is a bit unfair. Toss in anything made by either AyA or Ugartechea. These are all guns that will shoot whatever Wal-Mart sells, and need a minimum amount of TLC. They fit the general category of "good using guns for not a lot of money".