The cul-de-sac we live on has about a dozen homes, and it's an amazingly stable neighborhood. More that half the homes have been owned by the same people for ten years or longer. Two or three of the houses are still in the hands of the original owners (most of the houses having been built about 25 years ago).
For the past two years, there has been at least one house for sale at all times, and for several months during 2008 there were three houses on the market at the same time. It used to be something of a rarity to have even one house on the market, and the last time there were two for sale at once was 12 years ago, when we bought ours.
This weekend, the last house on our block sold. For the first time in a couple years, there are no houses for sale on our block.