The two small ones are Shark Navigator brushroll motors. They take about 4 mins to remove from the base. The larger one is a Miele motor. Those take about 10 mins to remove depending on the unit. I also grab the cord winder from the Mieles, which sell very well. Oddly, Dyson motors don’t really resell for as much, so I barely sell them. I do sell a ton of Dyson Active Base Plate motorized brushrolls though after I test them. If they don’t work, I sell the brushroll, soleplate, wheels, etc., as individual parts.