There are no discounted international business class fares. This company does not have a secret source for cheap business fare flights. Most of these ticket brokers purchase frequent flyer miles (which is against the terms of every airline's frequent flyer program) and use them to sell tickets.
Their address shows several other businesses in the same suite number; Delaware Corporate Services, Inkit, RBC DE2, LLC, SABBIA PD PROPERTIES, BRK Holdings, etc.
Airlines have become very good at canceling this tickets booked with stolen or purchased miles. You could arrive at the airport and find your ticket canceled.