Robotic vacuums glide across all types of floors and under furniture to collect dust and allergens while homeowners relax or run errands. The programmable bObsweep robotic devices patrol carpets and hardwood floors, hunting down dust, allergens, and debris to collect in their spacious dustbins. Purchased New 12/28/13 for $238 via Groupon (retail $500) Used approximately 6 times (max) since purchased.