Take $100 off all models of the Microsoft Surface Book at the Microsoft Store. Plus, the shipping is free. Discounts on the Surface Book are rare, and while other merchants are offering the same discount on the base model, only Microsoft is offering a discount on the models with keyboard-bases featuring the discreet Nvida GPUs, which is the feature that sets it apart from other 2-in-1s. All of the Surface Books have 8-16GB of memory, a detachable keyboard base, SSDs with 128GB to 1TB of storage, 6th Gen. Intel Processors, 13.5" 3000 x 2000 touch displays, and Windows 10. Sales tax is charged in most states.