The Rock. Dwayne Johnson. He’s a man of many faces: football player, professional wrestler, actor, tequila salesman, and social media guru (he has over 200 million followers on Instagram). He can add collectible phenom to that checklist, as well. Dwayne “The Rock” Johnson is layin’ the smackdown on the secondary market as some of his most coveted collectibles are selling for electrifying prices. The Rock is one of those eclectic figures in entertainment and pop culture. So are his collectibles. From football cards in his Miami Hurricanes uniform to the various autographed cards that are out there (believe it or…