Like Bill said, most of the time, especially dried board stock, it is sold by the BF, 12 by 12 by 1 inch thick. Depending on the wood, it can retail from minimum $3/bf to 'if you have to ask, you can't afford it anyway'. Since I buy logs, I recruit some friends from the club to help me move them around, and give them some wood. A 10 foot log of Oregon Myrtle/California Bay Laurel, dropped off in my driveway, costs about $180 per log, which is dirt cheap. My source buys them by the ton weight. I sell to friends for cost. Retail would probably be 4 times my cost. It just depends. When the AAW Symposium was in Portland a few years back, I took a bunch of blanks up. Probably charged 3 times what it cost me, but by the last day, I was giving a lot away because I didn't want to load it up and haul it home.... You never know what will sell and/or how much it can sell for. Perhaps, always leave some room for dickering....
robo hippy