does anyone know of a site for car price guides?

Try www.parkers.co.uk

Joolz

Try www.parkers.co.uk

Joolz

http://www.carsource.co.uk/tradeinvalues is better as it's Glass's which should be more accurate than Parkers.

I do hope parkers has become more realistic in its old age, can remember fondly laughing as people came on the forecourt with parkers for it suddenly to turn to horror when you realise they actually expected the figure quoted in there!