used products

I have seen this a lot lately on FB selling sites. Why on earth would you buy lotion, shampoo, perfume etc that is partially used from a complete stranger? So Gross. Go to the dollar store if you can’t afford much. I actually saw someone selling baby liquid Tylenol, saying her baby didn’t like it?! WTF…why would you but that for your baby, it’s opened and from a stranger, and how many babies like medicine anyway?