This week's What X Buys You is a beautiful hundred-year-old colonial in Petworth for $875K. While that might seem like a lot, when you consider the fact that it has five bedrooms, five-and-a-half baths, a fenced-in backyard, measures out at 4,500 square feet and is just about a five-minute walk to Metro, you might instead wonder how the price can be so low.