Amazon.com : Microsoft Surface Pro 8-13,Microsoft Surface Pro 3 (256 GB, Intel Core i7, Windows 8.1) - Free Windows 10 Upgrade,Microsoft Surface Pro 7 – 12.3,Microsoft Surface Pro 7+ - 12.3,Amazon.com : Microsoft Surface Pro 3 512 GB, Intel Core i7, Windows 8.1 - with Windows 10 Upgrade : Electronics