Update: Dead!
Shark:
Shark IQ Robot Vacuum with XL Self-Empty Base $319.99 [Was $599]
iRobot:
iRobot Roomba 692 Robot Wifi Vacuum $199 [Was $299]
iRobot Roomba i4+ (4552) Robot Vacuum with Automatic Dirt Disposal $399 [Was $649]
iRobot Roomba i6+ (6550) Robot Vacuum with Automatic Dirt Disposal $499 [Was $799]
Note: Amazon prices change frequently without notice. If the above item is not available at the listed price, then the deal is over.