Join Date: Oct 2006
Location: central Illinois
...Loaded question, 100 bft can be milled out of it, "usable" is up to you. How much he wastes is dependant on his skill (I am assuming he knows how to run the mill) Since he is coming to you that says bandmill. I get about 10% overrun, meaning I can cut 10% more usually than the log scales on my bandmill. (I charge by the lumber milled doing custom milling, purchase logs for myself by the scale)
At $0.50 bft him coming to you, it's a no brainer. You are getting free logs. Go for it, I can't see you getting hurt.