My experience has been good, never had any experience like that and I use them regularly. They are not perfect but for trade ins extremely rare for me to have problems
Their policy is that of second hand car salesmen and by that I mean the stereotype. They're dodgy, will do anything to knock a price down, it's your goods, but they don't believe you are entitled to anything or any profit from your goods, they expect you and your items to exist solely for themselves, to exist for their maximum profit. I would never sell anything to them. You'll get VASTLY higher prices and a better experience, simply selling your own goods on eBay. Why do they deserve any of your money as a middle man? Screw them and their piss stained shops lol.