I think you have answered the question yourself. I would add though, the dealers generally are more realistic with their pricing than a lot of dreamers on here, Ebay, etc. Also with trade you can usually get an extended waranty too. Again, there are a lot of "private" dealers out there - people who do a "bit of buying and selling". They are the lowlife, making a buck and not having to stand by the car. You are often better off looking at a car that needs a service and belts , £500+, and know it has been done for sure, rather than risking someone's say so. And HPI every car before you part with your dosh. Good luck!