In a world where convertibles appear to be gradually eclipsing the popularity of both traditional laptops and tablets, Microsoft isn’t afraid to constantly reduce its Surface Pro 4 and Surface Book profit margins if that means gaining the upper hand over Apple in terms of market share.

Of course, it’s not like these 2-in-1 Windows 10 beasts are sold at a loss for $850 and up and $1,350 and up respectively, so the Memorial Day sale currently ongoing on Redmond’s US e-store is a win-win situation.

For a limited time only, i.e. until Monday, May 30, select configurations of the two hybrid machines net you a cool 150 bucks in savings each… once again.

Weirdly enough, the Intel Core i5-powered Microsoft Surface Pro 4 with 128GB internal storage and 4GB RAM is now cheaper than the entry-level Core m3 variant, at $850 vs. $900. Twice the memory and a 256GB SSD, alongside the same i5 Skylake processor, sets you back $1,150 instead of $1,300, whereas $1,450 can get you a Core i7 SoC while retaining all the other specs.

Finally, the top-of-the-line i7/256GB ROM/16GB RAM model costs $1,650, which is by no means a steal, considering it doesn’t even include a keyboard.

But the larger, sharper, more powerful Surface Book does, starting at “just” $1,350 after a $150 discount with a sixth-gen Intel Core i5 silicon, 128GB SSD, and 8GB RAM in tow. The only other marked down 13.5-incher is the cheapest discreet GPU-packing option, which also offers 256 gigs of local hoarding room for $1,750.

Don’t forget about the separate but arguably sweeter Lumia 950 XL deal, with the 640 XL sold at $100 off list for a little while as well.

Source: Microsoft US