The super-fight was announced last week, but tickets are already being flogged through sites and the arena’s website.
The T-Mobile Arena in Las Vegas will host possibly the biggest boxing match in the history of the sport.
McGregor makes his boxing debut after spending the last four years becoming the undisputed pay-per-view and revenue king of the UFC.
Mayweather, on the other hand, is a multiple weight world champion and is considered one of the greatest boxers ever with an unbeaten 49-0 record.
Viagogo are asking up to £14,000 for the chance to see the historic event while the Arena has tickets on sale for a monstrous fee of $80,000.
Either way, it will cost you a pretty penny to be part of the action with Vegas set to be bursting with fight fans for the weekend.
McGregor and Mayweather announced the bout on their social medias to confirm one of the most unlikely matchups in combat sports.
The pair have traded insults for the last six months, but the prospect of an actual fight seemed unlikely with McGregor having never boxed before.
But the Irishman’s determination to prove himself has transformed the fight into a reality with the UFC releasing him briefly to compete outside of the promotion.
Mayweather will come out of retirement to face McGregor and will look to extend his undefeated status to 50-0, thus setting a new record.