I'm not surprised. This seller has been relisting and relisting seats ad nauseum, though they do seem to have a significant amount and variety from more than just Mopars. I'm a little curious as to how they came to have so many.
It interests me because if they do have Stow-n-go seats that would fit an RT van, then one could get the cheapest Grand Caravan "All American" package or whatever it's called and very inexpensively make it stow-n-go, or could retrofit a Routan cheaply.