A copy of “Digital Devil Saga 2” will cost you $19.99 at EB games. Or maybe it will cost you $29.99. Who knows! Depends on which one you’re lucky enough to grab off the wall. Price mistakes like this happen all the time and there’s not enough Weights and Measures people to catch them all. Maybe we can turns all these various price errors into a hit new gameshow. We’ll call it, “The Price Is Wrong,” and Kevin James, from “The King of Queens,” following the same career path as Drew Carey, can host.