To add to that I previously had a 2001 Honda accord type r was immaculate in championship white, tein coilovers, full stainless exhaust, long arm K&N, 17" lightweight wheels, top end rebuild, undersealed, uprated brakes all round it was kitted out, I part ex'd it in for my current car they said it booked at £350!!!! Basically said piss off they ended up offering me £1000 which I know was really low but mileage was against me and the car I wanted was a bargain and best I'd seen, so I part ex'd it in literally the next day it was up for £3000 and sold a few days later, it is worth what someone will pay end of, I was devastated I'd lost so much money but the bottom end did blow up a week after he brought it so good timing for me lol.
Moral of the storie expect to get raped part ex in, they need to make money there just a quick solution, sell it privately and get a lot more money.