With the changing weather brings many things: colder mornings; changing leaves; and, most important (particularly in this economy), a wave of sale events as the holiday season creeps around the corner.

There are plenty of early Prime Day deals already underway, but given that I’m WIRED’s resident vacuum tester, it’s no surprise vacuum sales caught my eye. Robot vacuums are tested near daily in my house with the help of my constantly sand-covered 4-year-old and litter-tracking cat, and I’ve changed the lives of multiple friends after persuading them to try a modern robot vacuum.

“Modern” is the key term here. If you’ve had the same cheap robot vacuum from years past that can’t map your home or connect to an app, you’re missing out on everything robot vacuums actually have to offer. Especially since most models can double as a mop and can detect where they should mop and where they should only vacuum. If you have yet to get a robot vacuum like this for your home, sales events like Prime Day (and pre-Prime Day!) are the perfect time to buy.

One of the best brands out there is Roborock, which has already put a few of its robot vacuums that we’ve tested and loved on sale. Here are the ones to snag.

Roborock’s On-Sale Robot Vacs

Roborock has finally started updating its more affordable Qrevo line this year after a period of inactivity, and the Qrevo 2 Pro is my favorite vacuum I’ve tested from the brand so far. Since it launched last month, this is the second time the 2 Pro has been on sale in the $500 range, though it was a little cheaper during Roborock’s anniversary earlier this month. Still, this is a good price for a powerful robot vacuum that packs 20,000 Pa of suction, easy app control, and an extendable mop arm that helps it get into tricky corners. It’s a new budget-ish pick in my guide to the Best Robot Vacuums, especially when it’s on sale like it is right now.