I get those for $20/$25 at Yard sales/Good Will.
Picked up a barely used, loaded to the gills with accessory's Sentria for $19 a few weeks ago at a yard sale,
Lady complained that she paid $600, from a "friend" and after using it twice it wouldn't pick anything up, "Had NO SUCTION"
So I get it back to the shop, open up the bag that maybe had 50lbs of crap in it, the fill tube was CLOGGED with enough hair to make a few wigs.
Washed the outer bag, cleaned the filler neck, new $1.25 belt, Hepa bag, Set the brush roll lower, and this thing will RIP anything out of the carpet that is not bound to the fiber.