Roomba Discovery robot Vacuum for parts ( Alpha-II) | eBay
Buy the iRobot Roomba Discovery 4210 robot only | GoodwillFinds
iRobot Roomba 4100 Repair - iFixit
My trusty 2006 Roomba Discovery, still regularly cleaning my workshop. I've repaired him several times over the years, and have just replaced some MOSFETs and transistors, but he's still reliable and hard