· broadcast. com co-founder mark cuban made the online purchase, spending $ 40 million us for a gulfstream jet. The jet changed hands for $ 40 million (£25 million). · he went online and bought a gulfstream g550 for $ 40 million , earning him a guinness world record for largest single e-commerce transaction. But no one, literally no one, has spent more on an internet transaction than mark cuban did in 1999, as per guinness world records. What was mark cubans next business venture? · in 1999, billionaire mark cuban bought a gulfstream v business jet over the internet for $ 40 million. · in a groundbreaking move that caught the attention of both the business and tech domains, billionaire entrepreneur mark cuban cemented his place in history by purchasing a gulfstream v private jet for $ 40 million via an online transaction in 1999. How much is mark cuban worth? American internet tycoon mark cuban , from dallas, texas, usa, bought a gulfstream v business jet over the internet in october 1999. Did mark cuban buy a gulfstream v? The purchase put him in the guinness book of world records , where he still holds. · the owner of the dallas mavericks, billionaire, and shark tank investor mark cuban, holds a guinness world record for the biggest-ever online purchase. How did mark cuban make his fortune? Cuban bought a $40 million gulfstream v private jet through an online transaction in 1999. Back then, cuban made it into that hallowed record.