“Under $300” is a moving target. Half the robots in this bracket are only here because of a discount, and half of those discounts are not real. This guide therefore works the way Cheaplorer works: recommendations follow tracked prices rather than sticker prices, and each pick links to its own price history so you can see what a good price means for that specific machine.
How to think about this bracket
At this price you are choosing which corner gets cut. Robot vacuums under $300 give up one of three things: mapped navigation, mopping, or self-emptying. Decide which chore you mind most. If you hate missed spots, mapping matters most. If your floors are hard, mopping is worth real money. If emptying the dustbin is what makes you abandon a robot, self-emptying wins even at the cost of the other two.
The unusual situation, as of August 2026, is that the Roborock S7 has left production, and its leftover stock drifts through this bracket on clearance logic. The S7 cut none of those corners except self-emptying, so while stock lasts the bracket contains one machine from a class above it. The trade is a shorter warranty and battery runway, which our S7 page covers plainly.
What we’d skip at this price
Stationary and handheld machines solve a different problem. The EyeVac Pro handles swept piles, and BLACK+DECKER dustbusters handle spot messes; neither replaces a robot. Stick vacuums like the Bissell Featherweight are chore tools you push yourself. The prices overlap with robots, but the jobs do not, so cross-shopping them by price alone leads to the wrong machine.
Bottom line
Buy leftover S7 stock if mopping or mapping matter to you and the price reflects an end-of-life machine. Buy the eufy 11S Slim, while its own leftover stock lasts, if the job is a small, mostly hard-floor space and you want to spend as little as possible. Watch the Shark AV2501AE if self-emptying is your dealbreaker, and let the tracker tell you when it enters the bracket instead of trusting a banner.