**TL;DR: **As of March 29, the Roborock Q10 S5+ Robot Vacuum is marked down to $279.99 in the Amazon Spring Sale. That's 49% off the list price of $549.99. Opens in a new window Credit: Roborock Roborock Q10 S5+ Robot Vacuum $279.99 at Amazon $549.99 Save $270 Get Deal If spring cleaning is on your mind, the aptly named Amazon Big Spring Sale is the perfect time to, erm, clean up on marked-down robot vacuums. That’s right, the third annual Big Spring Sale — which continues through March 31 — has stacks of tech deals, whether you’re in the market for Apple devices, laptops, smart TVs, or even drones. And among those deals is a sleeper price on the Roborock Q10 S5+ Robot Vacuum, a vac and mop combo that does the dirty work on your behalf. The Roborock Q10 S5+ Robot Vacuum has been marked down by a huge 49%, which puts it at the discounted price of $279.99. That's a total saving of $270 — this robo-vac's biggest ever discount. It's a full $50 cheaper than its previous lowest price.…