Don't dick around with buyers, just sell direct here if you have some of the stuff they're looking for
https://uk.webuy.com/I got rid of a huge pile of old dvds and games. The postage to send them was free and it was very smooth.
They pay for your postage to send the items in or is it Freepost? It never used to be. Don't see how they can make money on stuff if you send in a load of crap.