I can explain all
I figured the saw had some interest, but since it wasn't running, I figured it would sell reasonably well for $100, which is what I advertised it for here and on Craig's List. I put it up on eBay with a $100 reserve, in case nobody wanted to pay the flat price for it.
It sold in about 12 hours from the ad here to Mike (for the advertised price). I ended the eBay auction, which was up to $31, but there were about a dozen people watching the auction. I probably underpriced it, but it's no big deal to me; I just wanted it out of my crawlspace, and I'm glad somebody got it who wanted it.
Fortunately, I didn't get a reserve bid on eBay before I closed the deal; hate to see a chainsaw fight.