i got a .32 magnum revolver for like $150 because the guy couldn't find any ammo in person at a gun store. I just bought the ammo online, it was expensive as shit (>$1.20 per round) but hardly rare. I found .32 long at two local stores when i went to look but one of them only had a box of wadcutters because someone pawned it off on them and they didn't know what it was good for (i got it for twenty bucks, a box of 50 is worth ~$40). it's just such a boring and anemic cartridge that still costs too much money to be worth buying, i'd rather buy and shoot .357 for the same price.
boomers seem to view society through the lens that anything that isn't popular isn't worth time or attention but their idea of popular is just what direct marketing channels tell them, so even if something is widely avaliable for order and extremely popular, if it's not stocked at Cabela's it might as well not exist. I've had so many people tell me "20 gauge is extremely rare and impossible to find." No it's not, the stores here just can't keep it in stock, it's like 2/3rds of the price if you buy it online too. It's actually extremely popular