Quite a few factors can affect the value...
what colour is it? how is the body work? how is the interior leather? any signs of rust on the rear sills / wheel arches? Full service history? Any wheel corrosion? engine management light on or off? how much MOT left? Tyres in good nick, even wear? has the wheel alignment been done? When was the timing belt changed?
If it has full service history, is a dark colour with good interior and not too many scrapes and dents outside it can be £1,500. Subtract money for faults like an EML, rust.