I need some 31x10.50 or 32x11.50 mud or all terrain tires in decent shape (at least 1/3 tread, preferably more). I'd like to have Super Swampers or another good MT, but I would consider any MT or AT.

BTW, for a 15" rim

I have some old school Goodyear MTs that are 31x11.5xr15 that are at least 2/3 tread that I would sell for $250firm plus shipping.

Later

I just traded a set of 33x12.5 for a new set of 5 Rubicon stock wheels and tires(Goodyear MTR's), less than 4k miles. They are 16" but will still fit. I believe they are the equiv. to 31x10.50s. I am about to try to ebay 'em. I was planning on setting reserve for 800.00. Not sure how much you were wanting to spend, but thought I would offer.