Ta for all the replies guys and girls, and thanks MrS for the offer but probably pop out at lunch and take the one I've got an eye on for a drive... may be in touch tho!
If I may indulge the kindness of the honourable members a little further - does anyone have a CAP guide to hand and can tell me what I should be paying?
It's a year 2000 IS Sport, 34k miles, showroom condition...
I hope my family aren't expecting pressies this christmas!!