Microsoft Windows 8.1 64-Bit/32-Bit Full Version for $79.99 shipped after coupon code EMCPGPC38, Here is a screenshot for reference. Note this comes in OEM full version that does not require prior ownership and does not come with a pretty retail box. You will also need to do a complete clean installation rather than an in-place upgrade to, but the software itself is identical. Here is more information about OEM software.
This deal has expired as the coupon has been pulled. Congratulations to those able to get in on it.