According To Autolist.Com, Sullivan County Is Generally A Cheaper Place To Buy A Car Than Many Other Tennessee Counties. Sullivan County Ranked 30th On The List, Where The Average Vehicle Is 52-Dollars Less Than The State Average. The State Of Virginia, Ranked 15th In The States To Buy A Car, Falling 42-Dollars Less Than The National U.S. Average. The Study Used Pricing Data From 81 Million Vehicles And 4.6 Billion Unique Data Points.