iRobot Roomba i4+ (4552) Robot Vacuum with Automatic Dirt Disposal - Empties Itself for up to 60 Days, Wi-Fi Connected Mapping, Compatible with Alexa, Ideal for Pet Hair, Carpets : Amazon.ca: Home
Costco Summer Aisle 2021 Superpost! The Entire Household Small Appliances & Kitchenware Section - Costco West Fan Blog
Costco members can get the iRobot Roomba i4 robot vacuum on sale for $280 | Android Central
Costco shows an i4 robot to compare with the i7+ on its site. The link to the actual listing for the i4 does not work though. It appears that the i4 somehow systematically maps, but without a camera/vslam. : r/roomba