If you're still looking to get your hands on a Surface Book, BJ's is currently offering a solid deal on the entry-level model for one day. Currently, you can grab this particular Surface Book model for $1,299 and pick up a free Surface Dock to boot.
That price matches a current sale going on at the Microsoft Store and is $250 off its regular price at BJs. That said, the free Surface Dock spices up the deal quite a bit. For the money, this model packs in an Intel Core i5 process, 8GB of RAM and 128GB of storage.
Keep in mind that this deal is only good for today, April 6, for online orders. You'll also have to add the Surface Book to your cart to see the sale price. And if the deal from BJ's is still too rich for your blood, Newegg is holding a flash sale on the same model sans Surface Dock for $999.
Thanks to @erchew for the tip!