to be fair, dyson normal cost of ownership is minimal for 4-5 years. You pay a lot up front, but typically the filters are washable. There are some far cheaper bagless vacuums that cost a lot more to operate due to expensive replacement filters. I'm not convinced that the copycat brands (e.g. Hoover, LG, Samsung, Eureka, Dirt Devil & Shark) filter as well the Dysons.