30A, Sorry I'm thick this evening. I am having a hard time interpreting Median from the graph as it is expressed in a line more fluid than the dates. Do you have any clarification on what SHELLY and SB proferred?
Median is just a way to get a feel for how prices are fluctuating. Like scooter said, it tends to indicate the most common average price of real estate sold by negating major lows and the major highs. Average can get thrown off by sales that fall way outside the mean. For example if you sold three homes for 200K, and one mansion for 2 million, the average would 650K, but the median would be 200K.
But nice work 30Ashop. 
