FS: Backyard Adventures heavy duty infant swing

We have a Backyard Adventures playset in the back yard and for 2 years had the infant seat, just like this, only in green, and ours is raised a little bit in the back to give even more back support:



These things are extremely heavy, and very heavy duty. If my rump could fit in this thing it would easily hold me -- and a few of my friends. It has 58 inches of chain. Our swing beam is, I think, 8 feet high?

Anyway, brand new these things are $92.00. Or that's what they were 2 years ago according to our paperwork. I'm asking $20. It's ready to hook to an existing playset, in excellent shape, but my 3 year old is just too big for it now so he's graduated to the toddler bucket.