Floyd Mayweather vs. Oscar De La Hoya did 2.4 Million Buys.
Mike Tyson vs. Evander Holyfield II did 1.99 Million Buys
Mike Tyson vs. Lennox Lewis did 1.97 Million Buys
Mike Tyson vs. Evander Holyfield I did 1.59 Million Buys
Mike Tyson vs. Peter McNeeley did 1.55 Million Buys
UFC 100 did 1.6...