Makes no sense it is no different than any other TS of the era. I can see buying a legend's ax. Or even an amp in some cases. Stompboxes? Nope. What is up for auction next Jimmy Page's tube socks for $5000.
Cons:
No one other than a guitar player knows what it is, so future value is limited by that.
Anyone who is a the slightest Stevie fan recognizes the number one wife guitar, and all Stevie fans recognize his other guitars like scotch, The Hamiltone and Lenny. Only a guitar nerd can recognize that tube screamer as Stevie's