Microsoft has a quick sale on select models of the Surface Pro 4 and the Surface Book. You need to buy them soon, though, because the sale is only running through today and tomorrow. The $150 savings is money that you could use for other things, like a keyboard for the Surface Pro 4.

Interested? Microsoft’s Store discounted the Surface Pro 4 with 256GB of storage, an Intel Core i5 processor and 8GB of RAM. It’s now $1,149 instead of $1,299. The Core i7 model with similar specs is now $1,449 instead of $1,500.

Discounts also apply to the more expensive Surface Book. You can save $100 off of the Intel Core i5 model with 256GB of storage and 8GB of RAM, now priced at $1,799 instead of $1,899. The Core i7 model is on sale for $100 off, priced at $1,949.

Neither computer is particularly cheap, so any sort of savings is certainly welcome ’round these parts.