I never go in thinking kbb or nada because they are going to pull the bullsh*t dealer black book. That's when I walk out because they won't give you fair deal.
The 'fair deal' is based on the entire deal, not just the trade price. A dealer can give you 'way over' book value for your trade, and still end up 'overcharging' you on the final deal.
If you did your 'homework' you should be able to negotiate a 'fair deal' with most any 'reputable' dealer.
I've heard that line from more then one car dealer. Idk if rookie is in that business but it is a standard line they all use. My answer to that is doesn't that make kbb or nada non-biased or a neutral party?
Non-biased or not, used car pricing from books and online sources are usually based on information provided by dealers, manufacturers, and auctions...all of which have a 'vested' interest in the prices. I think that Rookie's point was that most people consider their car as 'perfect/like new/above average', when in fact, it is NOT! If you bought your car used, you may not even be aware of past accidents and body work, but a dealer will notice those problems and the price will go down.
The book/online pricing is only a GUIDE... they won't send you a check... Having the car appraised by a couple of new &/or used car dealers will give you an idea of what your car is actually worth.
Since most dealers will use Carfax or AutoCheck to see the history of a car, it's a good idea to know beforehand, what info is on there about your car.
For the record, I have personally bought and sold over 10,000 used cars and probably appraised more than 4 or 5 times that.