u/addym01

I go to the thrift store a lot and most of the time I'll see books or DVDs or even CDs that have library stickers on them. I figure these are just items that someone forgot to return and they've had forever so instead of giving them back to the library they just donate them instead. In that case should I buy them and bring them back to the libraries or is it more likely that it's the library itself that donated them and I'd be wasting my time?