So much less expensive buying an air purifier here than from brookstone. In the past I have bought most of my air purifiers from sharper image, brookstone or skymall --- I know that is probably not a good idea. I bought from this store only because the other sites are closed or not selling them anymore. I could not believe how much less they were on this site and how much better. I just wanted to warn others to buy from this site and stay away from high priced gadget companies selling purifiers.