On other hand I would be somewhat annoyed as customer if it had ended up with new items back in the shelve. You never know if something is missing or slightly broken.
I bought a carpet cleaner "new" from target via curb pickup. It was clearly used (presumably once), there was water in the plumbing, the bottle of cleaner was opened, and the cord was not machine wrapped. Never used curbside pickup after that. I did keep the machine though, for better or for worse.
I would have at least gone in and complained and get a discount (I have a similar carpet cleaner I got from the Walmart clearance aisle, best $30 or whatever I ever spent there).