Stanford, California
$50
Bought it new for $275
https://www.irobot.com/en_US/roomba-vacuuming-robot-vacuum-irobot-roomba-69-4020/R694020.html
It’s in decent shape - we still use it and works fine.
More stuff from my move out sale: Open in Google Slides
Please do not message this poster about other commercial services.