I have a number of Milestone 1/16 Drag cars with cases by Bob Campagna of DSR. Most are signed - Scelzi, Bazemore, Sarge, Shoe, Mike Ashley, Doug and Connie Kalitta, Gilby's Jungle Jim Car, Millican and both Bernsteins. Have three that need autographs - Bernsten's Buick Batmobile, Tom' 57 FC and Garlit's 300 mph car that (I think) was actually Clapshaw's car that Big borrowed.
I also have nine James Ibisuki lithos that were signed by drivers when they were produced. I got to talk to Shoe about James' art when he signed the "Manufacturers Championship" litho for me. The original hangs in his office at Schumacher Electric. The Holy Grail of my collection would be a personalized signature on "Big's First Indy" - I was there and was racing at the event.
Every one of these has a great memory attached - you can't walk up to a driver in any other racing series and get the responses I have had! -