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.
A stow-n'-go would still have the deep recesses in the floorpan for seat stowage. The panels that cover them when the seats are stowed can't hold any real weight. The s-n-g seats wouldn't stow in a flat floor minivan.
Possibly from retrofits, many are modified for other passenger uses like wheelchair-user vans, etc.