Bestbuy offers iRobot Roomba 2020 DustCompactor Combo Robot Vacuum & Mop for $160 (reg $450) with free shipping.

Product Description:
Only from Roomba®, the 2020 DustCompactor™ Combo Robot raises the cleaning bar with the industry's first-ever mechanical debris compactor right onboard. Dirt and dust are suctioned up, continuously compacted, and contained inside the robot for up to 60 days at a time. ClearView™ LiDAR ensures fast mapping, navigation & complete room coverage, while safely avoiding obstacles. The 4-stage Vacuuming System combines 70X more* power-lifting suction, a rubber brush that grabs all kinds of debris from crumbs in the kitchen to sandy footprints in the entry, a corner brush that reaches into tight spaces and pulls up dust-bunnies wherever they gather, and a microfiber mop pad to wipe away grime with 2X deeper scrubbing**. With its first-of-a-kind mechanical compacting system, there's no need for a separate self-emptying dock to clutter up your beautiful floors. ​

• DITCH THE DOCK.
  An industry first, only from Roomba®, this robot continuously crushes debris right inside using a mechanical compacting process, so you don't have to empty it for up to 60 days.
• A SLEEK SPACE-SAVE.
  When space is at a premium, onboard compacting and debris management eliminates the need for a separate self-emptying station.
• DEVOURS DIRT WITH MORE POWER-LIFTING SUCTION.
  4-Stage Cleaning includes more power-lifting suction, a Multi-Surface Rubber brush, and Edge-Sweeping brush to devour dirt and dust bunnies, plus a microfiber mop pad to leave floors shiny and clean.
• SUPER-SMART MAPPING AND NAVIGATION.
  ClearView™ LiDAR sleekly hidden inside the robot quickly maps your home, avoids obstacles and cleans in neat rows, even in the dark.
• RUGS STAY DRY WHILE MOPPING.
  Unlike other cleaning robots, the Roomba® 2020 DustCompactor™ Robot automatically detects and avoids carpets while mopping so your rugs stay dry – no complex programming required.