On fake Dunks, the registered trademark logo on the insole is thick and bolded, with the “R” touching the surrounding circle. Real dunks have a thin registered trademark logo, and the “R” does not touch the surrounding circle at all.

Locate the tag inside your shoe. All authentic Nike shoes have a tag sewn into them with their size, barcode and model number on it. You will recognize it most easily by the barcode. Look for it inside: The tongue.

Supply and demand, hype, and collaborations increase the price. They cost so much because people are willing to pay if they see the value in the shoe. Nike SB Dunk Supreme Stars resells for 630% more than the retail price. Supreme collaborations usually bring about a lot of hype in the sneaker community.

Of course, this is why they've been so exclusive for decades. Not to mention NIKE Dunks are extremely comfortable. “The hype around NIKE Dunk releases is at an all-time high and due to popular demand, we're currently out of stock,” explained Foot Locker on its website.