The best way, is to find a discount on your car, doesnt have to be local, print it out and present to the sales guy, at the last minute after a test drive, and just before ordering, if they don’t concede, just say “ok, I will put down a decent deposit if we agree, or I will have to think about it, and can you ask the sales manager, before we go. You can always agree to the price later if it what you want. I think due to the lack of competition in Scotland, ots always going to be tough, but there again they don’t know how far away you will travel to save £500.