Floyd Mayweather and Manny Pacquiao’s fight sold out within minutes and tickets immediately appeared on websites for as much as £47,000 ($70,790).
Only 1,000 tickets were made available to the public for the fight on 2 May at the MGM Grand in Las Vegas.
The remaining 15,500 seats will go to fighters, sponsors and promoters. The cheapest ticket for the bout cost £1,000 ($1,500), rising to about £5,000 ($7,500).
The contest between the two has been set since February, but a ticket contract was only finalised this week.