Bestbuy offers iRobot - Roomba i5+ Self-Emptying Robot Vacuum - Cool for $259.99 (orig. $499.99) with free shipping.

Product Description:
The Roomba i5+ robot learns and maps your home room-by-room so it can clean the room you want, when you want—with 10x the power-lifting suction and Premium 3-Stage Cleaning system. Powered by iRobot OS, it stays one step ahead of everyday messes, by learning your life and suggesting cleaning schedules—to clean when you’re out enjoying life. On-demand cleaning is only a command away, with Google assistant and Alexa compatibility that let you direct your robot to messes right when they happen. With Clean Base Automatic Dirt Disposal, Roomba will return itself to the base when the bin is full, automatically empty and resume cleaning, so you don’t have to think about emptying the bin for months at a time. (Compared to the Roomba 600 series cleaning system). 

• POWERFUL CLEANING—SCHEDULED AROUND YOUR LIFE
  Whether you’re relaxing at home or out enjoying life, the Roomba i5+ robot vacuum takes care of stubborn dirt and messes with a Premium 3-Stage Cleaning System and 10x the Power-Lifting Suction*. *Compared to the Roomba 600 series cleaning system
• CLEAN BY ROOM, YOU’RE IN CONTROL
  Roomba i5+ learns your home and creates an Imprint Smart Map so you can direct it to clean any room you want, any time you want—either on a set schedule or in the moment.
• DON’T LIFT A FINGER FOR MONTHS
  Now you can forget about vacuuming for months at a time with the Clean Base Automatic Dirt Disposal that allows the i5+ to empty itself into an enclosed bag that captures 99% of particles as small as .7 microns and holds up to 60 days of cleanings. ​
• MORE THOUGHTFUL THAN YOU THOUGHT
  The Roomba i5+ takes vacuuming off your mind with personalized cleaning suggestions powered by the unique intelligence of iRobot OS. Learns your habits and your routines.
• PRECISION CLEANING IN TIDY ROWS
  The robot vacuum cleans intelligently in straight lines back and forth, to thoroughly clean your floors while navigating around furniture. When the Roomba i5+ needs to recharge, it will resume right where it left off ensuring a complete clean.
• FOCUSED CLEANING YOU CAN COUNT ON
  iRobot's Patented Dirt Detect Technology allows the Roomba i5+ to detect dirtier areas of your home and clean them more thoroughly. Integrated sensors tell the robot where it can and can’t fit, so it doesn’t get stuck under furniture.
• PERFECT FOR HOMES WITH PETS
  Instead of using a single bristle brush, Roomba i5+ uses Dual Multi-Surface Rubber Brushes that flex to adjust to different floor types and avoid getting tangled with pet hair.
• CLEAN BY VOICE
  Start cleaning one room or every room with Google Assistant and Alexa* and let the robot take care of messes in the moment. *Works with Google Home and Alexa enabled devices. Alexa and all related logos are trademarks of Amazon.com or its affiliates. Google is a trademark of Google LLC
• FLEXIBILITY TO CLEAN AROUND YOUR BUSY LIFE
  The i5+ can be set to automatically start cleaning when you leave and stop when you come home. And with Cleaning Time Estimates Roomba tells you how long each room takes to vacuum in the iRobot Home App. ​