Tye place I bought mine from is more like a modern version of a pawn shop people take things in to get a short term cash advance and ideally get it back within a month paying a fair chunk of interest if they don't redeem within 2 months it's sold, others just sell stuff outright. Either way some good things often sell cheaply, cameras, audio and TV. tools, musical instruments, mobile phones, computers and peripherals and loads of CDs.
They even give a warranty which varies between 30 days and 6 months depending on the item.