Motorway - you enter your reg no and condition of the car and they give you an instant idea of the value. If you like it you then submit a load of photos of the car - they provide templates - and your car then gets listed online with a reserve price at 0900 on an agreed date. Auction, which is motor dealers only , ends at 1500. You are sent the best price offer around 1530 which you can either accept or decline - no pressure. If you accept, dealer will contact you to arrange collection and come to your house at an agreed time within a few days. They’ll take it for a 10” drive and provided the car is as described will transfer the money using faster payments into your account on the spot. In my case they asked for my account details in advance - sort code; account no. (Nothing else). Dead simple. Dealer who bought my car said he rarely negotiated on price and only when car was not as described and where sellers have been dishonest. He had walked away from a couple. If they do this too regularly Motorway drop them from their list of auction dealers so it’s not in their interest to mess you around. Costs you ABSOLUTELY NOTHING!! No time wasters or tyre kickers.
Check them out on Trustpilot. Loads of 5 star reviews. Wouldn’t hesitate to use them again.