The only unused ticket known to exist from Michael Jordan’s NBA debut in 1984 was expected to fetch an eye-popping price after a stub from the same game sold for $264,000 in December. Mike Cole was told not to be surprised if his ticket went for twice that amount. It didn’t quite reach that figure, but the experts weren’t far off and during an auction Saturday, Cole’s ticket to the Oct. 26, 1984, Chicago Bulls game sold for $468,000, according to Heritage Auctions. The price for the Jordan ticket was believed to be a record for such a collectible, but was quickly eclipsed in the same auction w…