I can't find anything even approaching $100 a cord.... Anyway, what about peach pits? I've got peach trees, and I probably end up with 10 or 20 gallons of peach pits in a season. Can I burn them? What about black walnuts? I had a branch fall off a flowering pear tree two summers ago, and it burns nice. That's mainly what I've been burning, along with some maple and oak.