Let’s say you happen to live in a state where pot (medical or recreational) is legal. Chances are you’ve noticed that dispensary prices vary widely, or you’ve suspected there’s a better deal on the other side of town. Wikileaf’s reverse-auction model makes it easy to comparison shop. Cannabis consumers select what kind of weed they want (a nice Banana Kush, say), then name their price ($20-$350) and enter how far they’re willing to travel to get it (50 miles is the limit). In a split second, Wikileaf trawls through its database of legal cannabis vendors and spits out the best deal.