Take it to three dealers see what they will give you for the car take the average that way you have a true valuation rather than a guesstiate.

Unthrottled beat me to it. I use autotrader as a decent guide.

Whatever you do, don't pay anyone to text basic information to your phone. You can get far more online for free.

One for jamie to add a few choice words... met an elderly gentleman about to trade in his 26000 mile chevrolet epica lt, diesel auto, (complete with a set of gouges in the rear wing and lots of rusty chrome) and he asked what it would be worth, Nearly had a heart attack when I told him, but then I nearly had the heart attack when he told me he paid full list for the car PLUS reversing sensors and front sensors too, tyre pressure warning system, suregard extra carpets, to boot more than £20.000. OUCH!!!!!

(he is thinking of buying an insignia but will reflect now i have told him he won't be able to reach to pull down the rear hatch when open.)

That is the first person in 20 years that i have seen pay full list price!

Thanks to all, I'll use Autotrader then as the most realistic basis to work out price and will use it with dealers in a part-ex (against a Kia Sportage, sometime in next 3 months or so).

I take it dealers have their own trade book to determine value, right?