I got mine off of ebay (new in box!!) from LaurasWorkshop (She's located in Las Vegas. Her email addy is
freenubbins@aol.com) and LOVE it!! Super sturdy - holds both my 6 y/o and my 5 y/o no problem. I think the total weight is 125 lbs. which is about 25 lbs more than any other one I've seen. I paid $129.89 total, including shipping - auction price was $92.00. the material is heavy duty and handles well - even my dh likes it after complaining how big it was and how much room it took up in the living room.
Oops!! Just noticed you were looking for a single. I know when I was bidding on mine (a double) she had a number of singles up for auction. This was as of 02-06-03. HTH