Base Unlimited The Base Unlimited set, released in 1999, has seen a significant increase in value over the years
A goofy, janky deck like last week's Obuna Grandsquall with a Primal Surge wincon may not hit it very often, but that can make those rare games where you hit it all the more sweet
Darkness calls him out for not understanding how helpless his friends are, and he responds that he isn't as strong as he appears to be and only continues fighting on sheer hope alone
Possible packs include Scarlet & Violet sets (Surging Sparks, Prismatic Evolutions, Paldean Fates, 151), Sword & Shield sets, Sun & Moon, and potentially vintage WOTC packs depending on availability
This has already demonstrated how high it can go and I plan to buy a lot of copies of this for personal use before I even start to speculate