That machine sure does bring back memories of when I used to buy all the trade-in vacs from the Kirby and Rainbow sales offices. We would buy every single one, then sort them into 'throw away' and 'rebuild' piles respectively. We rebuilt all the door to door machines along with the expensive retail machines like self propelled windtunnels, power-mate kenmores, etc. No one wants to buy a rebuilt sweeper anymore (the age of Covid has brought that to a halt). I now sell only new vacuums.