I remember reading about one gun buyback program that was giving out something like $200-250 per firearm, no questions asked. The first people in line were a handful of dealers with boxes of rusty old paperweights and they drained all the cash.
Not a single functioning weapon was taken off the streets but these dealers made out good! I was laughing my head off!
I know a few dealers that do that! It’s either stuff they can’t sell (due to melt laws) or wouldn’t want to sell anyway due to condition. In other words, total junk.