One ticket? As I'm sure you're well aware of, Duke home games are crazy expensive to begin with, but it's only compounded when you factor in an ACC game. People worry about buying tickets from "scalpers" outside the stadium. Truthfully, the highest premiums are found online. Buying a single ticket online could easily be $600, and that's probably on the lower side. If you really, really want to go, I would recommend bringing cash ($300-$500), and hang out by CIS. Single tickets are the best because there are guys hanging around trying to sell tickets at the last minute. After they've sold quite a few tickets to families/couples, often times they're left with single tickets, which means they have to sell them at a lower price. The longer you wait til the start of the game, the lower the price you can get for those tickets.