Yeah, it's crazy. I really think it's the 18.5 barrel that first time owners are looking for rather than any specific brand/model. If it's USA made, it's sells at a big premium. The Turks and the dealers have been able to capitalize on this by flooding the market with Turkish shotguns for home defense around the $300 level. Not a bad deal if you got to have one in today's environment. If it saves your bacon, it's really priceless.
Here's another recent Mav 88 auction: $565 + shipping + FFL transfer fee (well over $600 net)
Not a suggestion but more of a question. Isn't Hornady Critical Defense, 2 3/4”, 12 GA 00 too powerful for home defense? Indoors 8 pellets at 1600fps will go thru target and probably multiple walls. I've shot this ammo and it kicks pretty hard.