Hi Peter
I was a Nascar collector before i got into baseball again in 2012-ish.
Just the other day in Goldins auction, the same Senna card fetched some good coin.
Look at these:
https://goldin.co/buy/?search=senna&sort=
If your Senna graded a 10, it be a 34K card. WOW!
I once had the Jeff Gordon RC and Earnhardt promo cards. I know i had Kyle Busch RC.
Still have tons of diecast & cards with the wall displays, but they are all now boxed up.