When I was young back in the early 1960s, many hardware stores had barrels of old bayonets from the Civil War through WWII for sale cheap. Bolt action Army surplus Rifles were also for sale very cheap.
I bought two Mauser bayonets but they disappeared in a move when I was in the military. Lots of stuff disappeared in that move.
I don’t know how big a town you grew up in, but I grew up in Houston, and our 1950s Army surplus stores sold things you wouldn’t believe, includeing all kinds of great looking machine guns on bi and tripods.
I assume they were inoperable, but I almost got a French one with a large drum for I think, $35.00.
My dad also gave me lots of the stuff that he brought back from the war, and I found other things, from swords, to stamp collections, to helmets, and a bottle of 1939 German wine, in the attics and cellars of a lot of the grand old homes that my dad was tearing down for the Interstate.