Does anyone publish data on trending values across old and new vehicles

[Lemur]

I'd really love to get a report every quarter or year containing data on all makes/models over the years and the way their values are trending. I'd like to see which niche vehicles are finding their bottom and what's hot in the market at the moment. I feel like the data is probably out there somewhere, but finding it is the hardest part.

[Vprbite]

This seems like something the Robb Report or DuPont Registry would have (as well as car.com etc) in their algorithms but whether they publish it is another issue.