In an attempt to try and find a sweet spot for vehicles that hold the most value at a particular year model, I was wondering if anyone here has a data source for older pricing. I suppose we could work with retail or trade-in, doesn't really matter. I know hard copies of the auto dealers guide existed before but not sure if that is available from someone. Transunion does now offer this as an online service with price history, but limits to 150 searches and costs thousands.