I have owned 3 Roombas. A Red, a 2.1 Blue, and a 520 (or maybe it’s a 530). I gave away my 2.1 after 4 years and it was still working! I still have my 10 year old Roomba Red and my 7 year old Roomba 520! Both still work great! All they have needed over the years was brushes, filters, and batteries.