I'm a volunteer in a charity shop, and it's an eye opener. The items for sale are gratefully received, even unsaleable old and torn clothing is sold in bulk, as are damaged books.
However, donations regularly include: Chipped and cracked ceramics and glass; bog standard odd plates, cups, saucers; odd bits of cutlery; ancient plastic utensils; bags full of plastic coathangers; shoes with soles hanging off; opened and part used toiletries; broken toys.
My question is, who do donors think would buy a broken toy for their child? Or a filthy, plastic drainer, or a torn lampshade?