790好像Groupon上有特价http://www.groupon.com/deals/gg-irobot-roomba-790-robotic-vacuum-for-pets-and-allergies-1?p=6&utm_source=channel_goods-deals&utm_medium=email&sid=72be86dc-b011-404c-9da6-606ffac9e4af&division=chicago&user=49f8e7f31c61bb434b886a047315ae52034d25c8b73a33632c64d06bbbbb109e&date=20140908&s=body&c=deal_img&d=deal-page&utm_campaign=72be86dc-b011-404c-9da6-606ffac9e4af 不知道跟美亚比划算吗?