How much does it cost to sit courtside at Game 7 of the NBA finals? According to a new lawsuit … $25,000 PER SEAT … and Floyd Mayweather Jr. still hasn’t paid his enormous bill (allegedly).

Mayweather was just sued by a company called White Glove International, which says Mayweather hired it on June 20th to purchase 3 courtside seats to Game 7 in Miami between the Heat and the Spurs.

FYI, Game 7 was on June 20th … which means Mayweather purchased the tickets the day of the game. Pretty ballsy.

According to the lawsuit, each ticket cost $25,000. White Glove says Mayweather also purchased an additional ticket in the first row for $5,000. Four tickets total.

All told, the bill came to $80,000 … and White Glove says Mayweather still hasn’t covered the tab.

It’s suing for the entire sum plus interest. Calls to Mayweather’s camp weren’t returned.