ok, this may give people the wrong impression about car supermarkets, which I dont want because I have had good experiences with them, the good one I know of is hilton garage, another is motorpoint, my experience with hilton went like the following,
find car on website (ghia x mondeo)
go in and find cars on the site (they had 6/7)
find a salesman and ask for the key,
salesman fetches me 3 keys (titanium x mondeo (155), st220 petrol model and the 130 ghia x) gives me a pair of trade plates and tells me to go look around and drive around in them.
choose one, poke around it and go back to salesman
try to negotiate the price but its really a take it or leave it kinda place, their prices seemed to be fixed.
get offered finance, they didnt try to sell me it, merely offered it.
they tried to sell me gap insurance but when I said no they backed down
collected the car a week later.
I really like the straight forward dealing I had with them, no faffing around, if you like the car buy it ( the car was at a very reasonable price, not 1k over book)
also the brake disks on mine were warped (the wheel shook while breaking) so I rang them up a week later after purchase and told me to send a quote from the local dealer as proof of the fault and then ask them to bill the garage for the disks.