Microsoft on Sunday decreased the prices on its Surface RT tablets by 30%, with the 32GB model selling for $349. The 64GB Surface RT was also discounted by $150, and now sells for $449. The Surface RT is available at Microsoft's U.S. retail partners including Best Buy and Staples.

Microsoft has also cut the prices of its RT tablets in japan, as part of the company's efforts to clear its existing inventory in preparation for a second-generation line of Windows RT devices.

Microsoft has not revealed sales figures for the Surface line -- which also includes the Surface Pro, powered by Windows 8 Pro -- but estimates by research firms like IDC have been lackluster.