I’ve bought 3 of them online before covid.
availability wasn’t consistent even then and that seemed to effect pricing. I don’t remember them being that expensive.
I’m not sure what style you are looking for but I used a couple of these cruiser style that have sort of a diamond style pleat stitched into the vinyl cover with something that feels like memory foam. Has the usual springs like a lot of springer cruiser saddles do but also has a web of springs...