Is KBB Accurate?
 

It seems like KBB uses a generic depreciation algorithm instead of doing actual market research.

Given that Nissan lowered the price of the 2014 370Zs by $3,000, wouldn't that mess up KBB pricing?

Just wondering if anyone has already researched it. If KBB is higher than what cars actually sell for.

KBB is pretty generic for pricing, they do pull data from other sources and then basically "average" it out.
It is a solid starting price, but never expect to get the top dollar they list.

So I guess the question is, should we subtract $3,000 from what KBB says on used car values?

I would not say that is the exact way to do it.
My usually plan is to source multiple sites, KBB, NADA, craiglist, etc. to get a good overall view of current pricing.

I agree with theDreamer that you shouldn't depend on any one source. KBB is usually pretty accurate but some models, especially low-production models like the Z, can be off a bit.

KBB is the worst thing to value a vehicle. Use nada.com

KBB is a good starting point to determine a car's value. Also most lenders rely on KBB for their loan to value calculations as do many insurers.

With that said, there are other on-line resources to assist with valuation.

If you're buying or getting loan values look at NADA. If you're trading in, look up black book.

Edmunds.com is a great source as well.

KBB does not take into account the drift tax for S-chassis, that's for sure.