Google has just put its new Nexus 4 smartphone and Nexus 10 tablet up for sale at the Google Play web store. The phone retails for $299 for the 8GB version, and $349 for the 16GB variety. If you want either, you’d better hurry and order – the U.K. Google Play store sold out in a matter of minutes when the new Nexus hardware went on sale there earlier today.