I recently went to the grocery store and before I started scanning at the self-checkout, I realized someone else had scanned a box of “Men’s libido max” pills and apparently left as it required ID or something to buy, and I guess they didn’t want to look someone in the face and buy it.
So then I had to look someone in the face while they cleared it from the register, probably thinking that I was the one who had the change of heart.
I was thinking the seller might have a curse that would cause her to get hit by a car, but she had the crystal that was constantly protecting her until she handed it over. But I like your idea too.