Anyone has access to BlackBook pricing?

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This is actually a very unusual market for used cars. I don't think any book will get you closer than about +/- 10% of what any particular car will sell for.

My suggestion is always to focus far more on the car than the price. If you found a sweet car, negotiate your best deal and be prepared to walk away if the seller is completely unwilling to meet you in the middle. If it really is "the one" a difference of $2k one way or the other won't matter in the long run.