I saw a tree crew taking down a couple of medium sized dead/dying ash trees when I was running errands in the city. I casually rolled up and asked what they were going to do with the wood. One of the guys said "take it if you want it!" So I grabbed what they had cut into manageable sizes - plus one random piece of elm that one of the guys took out of his truck and tossed into mine. Can't complain about the price!