Mayweather Fight -- Buyers Lined Up for $87k Tix ... Broker Says

Seems an $87,500 price tag isn't deterring rich people from the Mayweather vs. Pacquiao fight ... because the broker selling the seats tells TMZ Sports he's already got "serious" buyers lined up.

We broke the story ... the guy who runs Precision Concierge New York (PCNY) says he's secured 39 tickets to the fight, including ringside seats, which he's selling for $87,500 each.

Hours after he posted the tix and the prices, Oren Schneider says he's already had real interest from legit buyers looking to throw around some serious dough.

"I've been getting phone calls all day," Schneider says ... but so far, the ringside tickets have not been officially snatched up.