I've collected Nascar trading cards since they first came out in 1988. I don't buy or trade for cards I buy boxes and cases of boxes of unopened packs of cards and open them myself. I have certified autograph cards, autograph memorabilia cards, rookie cards and all inserts of all nascar drivers past and present. The point is when a driver goes to toyota the price of their collectibles goes into the toilet. Dale Jarrett, kybu, Hamlin, mikey, Matt Kenseth etc etc. Each went from the penthouse to the outhouse. To this day Tony Stewarts collectible value is the only one that has fully recovered although Martin Truex is starting to edge back up a bit. When you have a 1/1 Tony Stewart autographed sheet metal card worth $450 to $500 drop to $40 within a month of him going to toyota and rising back up to $350 after he goes back to Chevy tells the story. This is an unbiased view of fan manufacturer loyalty. Was I pissed about losing thousands of dollars? Yep. By the way this isn't book value. A true collector goes by what is being offered for a card or what a similar card sold for.