I see brand new 308s and Slug Shot guns starting for the single shots at 200 and 250. I think the shot gun was about 250, because it came with a real walnut stock and the 308 had a plastic stock, so it was only 200. Both came from name brand manufacturers, who get respect. No tax (shipped to my state) and free shipping. All you gotta pay is the FFL transfer, which I've seen as little as 5 bucks or as high as 80. Most guys around me want 20 bucks.
I'd double check with some local gunstores to make sure those guns were decent quality, before I bought one, especially if I was strapped for cash. And seriously, if I could, I'd hold out for something a little bit nicer. A decent gun should out last the owner.