There is a firesale on some new 12GA single shot shotguns over at Gunbroker. Apparently according to the description:
Just look under single shot shotguns and they should show up. They just had 10 auctions that just ended, I won one for $63, plan on it just being a truck gun stored under the seat where I dont care about rub marks or scratches. Anywho there are a bunch more selling tomorrow, should be in the $60 to $70 range.This shotgun is brand new in box inventory, but is excess custom-made inventory that a large big box store that canceled their order. It is in good new working order but without manufacturer support or warranty. It is a BRAND-NEW SHOTGUN and all run great. The frame may be marked with a major manufacturer (or importers) markings, but is custom made white label for ST Auctions.
Buy and sell single shot shotguns at GunBroker.com for a wide variety of single shot shotguns around the world. With quality single shot shotguns including Winchester rifles and Benelli shotguns, you can find great deals and better value.