The total value of land for sale in Virginia's Buchanan County recently on Land.com was $4 million. This represents around 1,000 acres of farms, rural land, hunting land and other land for sale in Buchanan County. Buchanan County ranks 105th out of 133 counties in the Old Dominion for the total number of acres of land currently advertised for sale. Of all farms and rural real estate for sale in Buchanan County, Grundy had the most land for sale. Mining and mineral extraction-related services are the main economic drivers in this part of Virginia. Buchanan County is Virginia's 27th biggest county (503 square miles). It's located in the Mountain Virginia region of Virginia.