Clutching a plastic bag and sporting a winter hat and beard, he looks just any other New Yorker riding the Subway home.But look a little a closer and you might notice this isn't your average commuter. Google co-founder Sergey Brin, who has a net worth of $17.5 billion, was snapped travelling on a downtown train late on Sunday night.

And while he didn't appear to be the most glamorous of passengers, he was sporting his company's yet to be released Google Glasses - worth $1,500 a pair.