Get 58 percent off one of our favorite Shark robot vacuums this Black Friday

It's a good time to pick up a robot vacuum on sale for Black Friday. Shark machines are some of our favorites, and we're seeing a number of models discounted for Black Friday. But this one, the Shark AI Ultra robot vacuum, is probably the best deal for most people this year. It's 58 percent off and down to an all-time low of $250. <br /> One of this model's standout features is its bagless design. Like many robovacs, it has an auto-empty station. But here, you can remove part of the base, dump its contents in the garbage, and lock it back in place. The base holds up to 60 days of dirt and debris, and you'll never need to order bag refills. <br /> <br /> <br /> The Shark AI Ultra has strong suction and decent obstacle avoidance (via LiDAR). [...]