 There's no sleeping on it for buyers who find something they like. A home on the market in the D.C. metro last month that sold went under contract in an average of seven days. Listing service Bright MLS says the number of listings is up 22%. The median selling price is up 7% from a year ago. And the median price of a home that sold in Arlington County last month was $808,000. That's almost 24% more than a year ago.