Ooo, shady-looking sling, no doubt. And the Amazon reviews tell it like it is. I like how in the product pics, the model is holding the baby through the sling to keep its face visible.
I would contact the store and maybe suggest they reject/return/donate (to a BWing group's teaching library) the items...it would help to educate them a little on what not to accept in future and what to tell consigners who come in with these types.
Then again, I'm assuming it's a resale shop. If it's a full-on retail place, they should just pull the items.