The £4, tiny computer made by Raspberry Pi has completely sold out, less than 24 hours after it was released. The little board — which packs in the same power as some recent laptops — was only release yesterday but has already sold out. That includes the magazines that were giving the little chip away for free. Now copies of the magazine are selling on eBay for as much as £50. But the company is warning people from giving money to touts, instead assuring customers that they will make more of the little circuit boards.