Ebay offers Refurbished Shark AI Ultra 2in1 Robot Vacuum & Mop for $152 with free shipping.

Product Description:
The Shark AI Ultra 2-in-1 Robot combines an ultra-powerful vacuum with Sonic Mopping for a complete clean from start to finish. First, it’s an ultra-powerful whole home vacuum on carpets and floors that empties its own dustbin. Second, it’s an ultra-powerful vacuum that sonic mops hard floors at the same time. It features Matrix Clean, which allows your robot to clean from multiple angles in a precision grid ensuring no spots are missed on all your floor types. With Precision Home Mapping, the robot uses its 360 LIDAR vision to scan your home and build a detailed map, enabling fully autonomous movement. It's a cleak freak. So you don't have to be.
Highlights:

• 2-in-1: Ultra-powerful whole home vacuum and sonic mop for carpets and hard floors
• Matrix Clean: The vacuum cleans in a precision matrix grid taking multiple passes over dirt and debris for whole home, deep cleaning coverage
• Self-Emptying: Bagless, self-emptying base holds up to 60 days of dirt and debris
• CleanEdge Technology: Uses blasts of air and corner recognition to remove debris from edges and corners