you can get lucky with WBAC I got offered £19k trade in recently for my 2016 white 3dr with DCC and Prets and got just over £22k from WBAC and that was with them knocking me down £500 for a few stone chips. Its a bit randon on how they check as they went over the front end very thoroughly and then wizzed over the rest and missed that 2 of the wheels had minor scuffs and that the tyres were fairly low.