This Microsoft Surface Duo Dual-Screen Tablet (GSM Unlocked) drops from the already-low sale price of $399 to $349 after you apply our exclusive code BRADS in the cart at BuyDig. Shipping is free. This was the best price we found by $50. This has 6GB of RAM, 128GB of internal storage, and a dual-screen form factor. It can connect to the internet over WiFi or an optional mobile plan (GSM only). The code will also work on the 256GB model, dropping that price to $429. Note that this will not work on Verizon's network. Sales tax is charged in most states.