Finally… Nike has answered the wishes of sneaker heads and movie buffs. The auto-lacing Nike Mag sneakers from “Back to the Future Part II” is now a reality. What once seemed like nothing more than futuristic fiction sneakers, can now be your everyday street wear if your willing to pay some hefty moolahhh!

But theres only 89 pairs that were produced, and resell prices regularly at $20,000. For buyers who need some extra peace of mind, consider this authentic pair, which has been authenticated by Heritage Auctions and will soon be offered on eBay’s live auction platform.

This 2016 variation of the Mag includes Nike’s auto-lacing technology, which can be controlled with the push of a button inside the ankle collar. It also comes packaged in a special-edition box, which is individually numbered and signed by Tinker Hatfield. Making this pair even more significant is the fact that it’s numbered 89, making it the last set in the limited-edition production run.

This set of Mags will be auctioned off starting Nov. 6 at 2 p.m. ET. Its starting price is $15,000, and Heritage Auctions estimates that the sale price could reach $30,000 to $50,000.