A Comparative Market Analysis [CMA] often includes Days on the Market [DOM] for each comparable house sold. 

When Real Estate is booming and prices are rising, houses may sell in a few days.  Conversely, when the market slows down, average DOM can run into many months.

I can tell you whether your area is currently a Buyer's market or Sellers market. 
In a Seller's market, you can price a bit beyond what you really expect, just to see what the reaction will be.  In a Buyer's market, if you really need to sell promptly, offer an attractive bargain price.