I have a few, mostly ones I got as either broken or tossed out. some needed cleaning to make them work, as people think a cyclone filter does not have a back up finer filter for the dust, and toss the unit out when it clogs. Have one for car interiors, cheap and nasty, but small, and a few upright Hoover (real Hoover, though unfortunately all plastic) and cylinder ones for home and garage.
I even had to give some away, as having 5 sitting in the store was too much, and they went to good new homes.