Ruby Lane, the world's largest curated marketplace for vintage & antiques, does an amazing job of introducing urgency, social proof and a reminder of scarcity...View More
on their product pages. If you think about it, the antique selling business, full of one-of-a-kind offerings, is the perfect & possibly easiest business to demonstrate just how scarce the goods being offered are. Ruby Lane takes this to the next level by telling you how many others have added an item to their wishlist or maybe even in their cart. They do a fantastic job of leveraging their wishlist feature & coupling it with cart additions to keep you guessing whether the people interested are literally about to buy or simply liked the item, but never intend to buy it. Without the wishlist and proper traffic, this tactic could backfire, but Ruby Lane pulls it off.