Cellular is a good keyword, check the report http://www.sitefirms.com/domain-sales/cellular However cellulars is not a commonly used word, Infact it is rare for somebody to use it unless it is a typo. Check yourself http://google.com/trends?q=mobiles,cellualars,cellular&ctab=1&geo=all&date=all http://google.com/trends?q=cellualars&ctab=1&geo=all&date=all Also it is .tv extension. In summary low $xx IMHO.