Why would anyone want to do this? Answer me this: if you needed or wanted a bike helmet, would you buy a used one to save money? Especially if it's never been

Why would anyone want to do this? Answer me this: if you needed or wanted a bike helmet, would you buy a used one to save money? Especially if it's never been cleaned? (Those foam pads inside don't seem to be conducive to cleaning.) What kind of person would steal a helmet?