Sorry to hear about your bad health, never a good feeling to have to sell things when you don’t necessarily want to.
Unfortunately, the audience of this forum is predominantly from long after that era. Best bet would be collectors groups on facebook, and checking out listings that have actually sold on Ebay.
From somebody I won’t name but who definitely knows:
“I’d say in that condition, (shame about the spray paint) around £250-300+ its a fickle market out there. What sells for £350 one day might only sell for £85 a month or less later. Nerd Alert! -The blue Kryptonics are seconds as the raised lettering was lathed off on the seconds. Alpine Sports used to sell them. My first set were 70mm red seconds from.the Knightsbridge branch.”