What are some of the top market/MLS statistics important to your clients and how do you arrive at those numbers?

I'm putting together a monthly newletter insert and I'd like to keep some sort of running stats that show my clients whats happening in the marketplace.

Any help would be very much appreciated, thanks.

I have a million stats at my fingertips, but no one has ever asked for them!
But just last week I had a client who owns his home free and clear and has already moved out, ask this question:
Do you think the home will appreciate more than 9% in the next year? If so, then I will wait a year to sell it. If not, I will sell it and invest the money since I have an available 9% investment.
What I did in that situation is take his subdivision and three others like it and show the average appreciation for each and together over the last four years. Then I made an educated and not guaranteed guess.
--A