For the price of Facebook ...
1923 Bugatti Veyrons
You and almost 2000 of your closest (Facebook) friends could be zipping around in a Bugatti Veyron SuperSport each for a cool $5bn. You could even amuse yourself by forcing Bugatti to supply you with cars in hideously clashing colours – we're thinking Lemon and Violet – just for the lulz. You never know, Zuck could be planning a real-life bumper cars sesh for the first day after he raises the cash.