If you’re in the market for a laptop, you may want to keep an eye on the flash sale happening today at Cowboom—they’re rotating through an assortment of refurbished laptops all day long, each of them at rock-bottom prices and available with free shipping.

The only catch is that there seems to be no way to predict what will come up when, or how long it’ll last. Right now I see a nice Toshiba machine for just $170, but it could be gone by the time I hit publish.