I got my first Dyson from eBay a couple of weeks ago. I fixed the broken floor nozzle hose and it has been running great. As with all vacuums I get that have filters, last week I ordered a new pre and post motor filter for it. I don't know what the history of this machine was, so I wanted new filters. Well, when I opened up the post filter compartment, I was shocked at the amount of dirt in there. Not just fine dust, but heavier course dirt, almost like sand. The Hepa filter was caked. I got out one of my other vacs and cleaned out the compartment and installed the new Hepa filter, as well as the new pre motor filter. Again I was shocked at the improvement in performance. I now hate the hose attachments because when I try to use them, the hose contracts and pulls the machine to me. Why would all that heavy dirt be in the Hepa filter compartment? Could it be someone ran it without the pre motor filter in place?