I sold it in ebay for 3 years good money at first until price fall like shit. Good money starting but full of shit problems.
Cock and cunt hairs get suck in the wheel bearings and manufacturer keep changing electronic design until almost give up and loss some money. You can get 1 for $90 chip chip cheap.
Prepare battery dead after 6 months. Irobot brands or cheong ones from internet came from one manufacturer Midea from China. I know because all parts are the same. In US market as Irobot. Australia as Robomaid, in China all shit brands you name it.
Just get one from Chink Alibaba site and buy new one every year. Now hearsay come with perfume spray.
Good luck.