Skandhaless
Striker
A like the Glasses guide ?Used car pricing guide. It gives you the trade and retail prices for every car and takes into account things such as condition, age, mileage and history.
I never really buy cars that are still dealer serviced . I tend to buy 5 years old and more, up around 70-80k .
I am still a bit swayed by dealer history if I can get it though or at least specialist. You presume they've had what they needed.