Staples has the Microsoft Windows 8 Professional Upgrade Version (boxed retail version) for $70 - $30 off with coupon code
41793 =
$40 with free shipping. You can get it in-store for the same price with this
printable coupon [Exp 10/27]. If you don't need the disc/box,
Microsoft will let you download the Pro upgrade for $40 for the next few months. Add
Media Center for free.