There was a total of nearly $5 million of farmsand rural real estate for sale in Buchanan County, Virginia, recently on Land.com. The total size of all Buchanan County farms, rural land, hunting land and other land for sale was around 1,000 acres. Buchanan County ranks 105th out of 133 counties in the Old Dominion for the total acreage of land currently advertised for sale. Of all farms and rural real estate for sale in Buchanan County, Grundy featured the most land for sale. Economically speaking, Buchanan County's is largely dependent on mining and mineral extraction-related businesses and services. Buchanan County is Virginia's 27th biggest county (503 square miles). It's located in the Mountain Virginia region of the state.