We don't use 'books' anymore. Evaluations are done with on-line sources. Much faster updates.

A 30% increase in value is actually a bit light. Somewhere closer to 40% would be more accurate. And reasonable mile older stuff can be double. Just one example; I evaluated an '09 Lincoln MKX a couple of weeks ago. Last year's Manheim Market Report put a 100k unit's average selling price at auction at around $2,200. This year, that car is averaging over $4,000. And the MKX is not exactly a primo piece.

Crazy stuff which will continue until new vehicle production catches up with demand. But that is not imminent. And meanwhile, some manufacturers are changing the game by moving away from large inventory on lots and to a build-to-order profile. Interesting times in the car industry which will never again look like it did a couple of years ago.