Driving through a neighborhood in town this afternoon, I seen where last summer someone had cut down a large (36" or so) box elder tree in their yard. The branches were removed, but the entire trunk is lying there and it is pretty twisted and gnarled. I'll bet I could have it for free if I hauled it away. Nearby is another big standing one that is all knobby and has close to a 4' burl at ground level. Maybe I should go introduce myself and get aquainted.