The going rate for a used Sony PS4 500GB right now is £80.00. To see the available quotes we have from UK recyclers, take a look at the table on this page, and you can compare how much they're offering and what their services are like.
The highest quotes of all are on brand new devices, ones that aren't locked to a network, and ones in excellent condition with no broken or replaced parts. More recent models almost always go for more cash than older versions too.
See how much your Sony PS4 500GB is worth: See quotes from recyclers