Check out recipe-nft on Rinkeby.
Address: 0xF12bd5b33039E24b81845bA08b6079F0eE215039
Recipe NFT utilizes the Ethereum blockchain to allow users to buy and sell unique recipes. This means no duplicate recipes can exist on the blockchain at once and recipes have a direct value.
As a recipe is bought and sold multiple times, its price will increase. This adds value to the recipe over time. After a lengthy period of trading, a recipe will have aged and been kitchen-tested many times, validating the higher price it is now worth.