Thanks guys your advice has been really useful.
I have managed to find that car I like, 2008, SEL, MM, SatNAV, only done 8K going for 25k. I have managed to get them down to 22K (including my trade in) and they are throwing in the, paint protection, tyre and alloy cover and the gap insurance + a full fuel tank, 1 years road tax, the 10k service, refurbing the front 2 alloys, new mats through out. They will not move on the price so I am getting what ever I can out of them. Does it sound ok or should I try for more. Need to decide soon. :D