A combined around 1,000 acres were listed for sale in Buchanan County recently; the overall value of all Buchanan County farmsand rural real estate for sale was nearly $5 million. Buchanan County ranks 105th out of 133 counties in the Old Dominion for the combined amount of land currently advertised for sale. Of all locations in Buchanan County with farms, rural land, hunting land and other land for sale, Grundy featured 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 largest county (503 square miles). It's located in the Mountain Virginia region of the state.