What’s better than owning an authentic pair of the Nike Mag? Owning a pair with the very limited “plutonium case”, or course. For the right price, one of only 40 special cases for the Back to the Future sneaker can be yours. Modeled after the carrying case for the plutonium to power the time machine, the yellow case houses the pair of Mags in an intricate pull-out display for the ultimate edition of the already highly sought-after sneaker. Oh yeah, it’s also personally signed by the two that made the retail version of the Mag possible, Tinker Hatfield and Tiffany Beers. The ultimate Mag set can be yours now, up for sale for the monetary equivalent of 1.21 gigawatts on eBay.