Average days on market is misleading. It averages well priced homes, distressed properties and overpriced properties. If you look at mls on any given day, you will find most of the listings are well over the 51-55 day average. This is because in this market, with just over half of the inventory we should have, properly priced homes are selling very quickly. Often they are under contract in under 48 hours from initial listing. Financing and closing can take 45-60 days giving you the days on market. Investors will sometimes by the best deals, for cash in as few as a few hours after a house hits the market. Closing is typically in 10 days.
If you are buying, you want to be very aggressive and efficient in your search. Don't spot a house you like on Tuesday, and expect to see it Saturday if it is a good deal.
If you are selling, an experienced agent can help you take the time to prepare the home and price it right. If you take his/her advice, don't be surprised if there is a crowd on listing day!
If you would like to discuss this further, I can be reached at 520-370-8907.