A common refrain for both landowners and drillers who want to buy/sell/swap mineral rights for drilling is the same: How do you find buyers (or sellers)? Some have resorted to auctions. Others, plain old word-of-mouth. They both have a new way to find buyers or sellers: Something called RealX, an online mineral rights property database. Kind of like Zillow for mineral rights, according to the Pittsburgh Business Times. The new service just launched with over 6 million acres of mineral rights.