Fight fans attending the much-hyped boxing match between Floyd Mayweather and mixed martial artist Conor McGregor will have a chance to rub shoulders with the stars in Las Vegas - but it won't come cheap.

The cheapest ticket listed on reseller StubHub is going for an eye-watering $1675 with two weeks to go until the Aug 26 fight which pits undefeated boxer Mayweather against the UFC's lightweight champion in a 12-round super welterweight matchup.

"Usually for these large events it's comparable to a Super Bowl. There's going to be a lot of stars at these events, especially in the high-priced ticket range, the ringside seats," StubHub spokesman Cameron Papp said.

"This is a once-in-a-lifetime, bucket-list event, so the die-hard Mayweather and McGregor fans are usually going to find their way to the event."

The fight has not yet sold out, with high face values and a lack of access seeming to have slowed down demand.

Yet Leonard Ellebre, CEO of Mayweather Promotions, dismissed concerns about the fight's popularity earlier in the week.

"This isn't a damn Rolling Stones concert. They're the only thing that sells out in seconds, he told reporters at Mayweather's media workout in Las Vegas on Thursday.