I found big $100 discounts on a few robot vacuums over at Walmart. Check out these nice deals on Eufy and Shark items:
Eufy RoboVac 25C Wi-Fi Connected Robot Vacuum – on sale $149 (reg. $249)
Shark ION Robot Vacuum R75 with Wi-Fi (RV750) – on sale $199 (reg. $299)
$199 (reg. $299)/Shark ION/Robot Vac!