Mad? I don't know, but in looking at more of his auctions there are more than a few like this. Although most I glanced at seem to have a correct "estimation" of condition, there are several that defy explanation.
I ran into the first one because I was looking to see if there were any CC "pocket pieces" to be picked up cheap. Not for my pocket literally, but cheap, worn, specimens with "character" just for the fun of having a CC to hold and handle. Also some keys that I will never be willing to afford in high grade for my album, so let's stick one in there and "fill that hole".
The tricky part on his auctions is whether people will bid on the description, or the coin as shown. A CC in Good that has a street value of $70 would be a good pick up at $35 or $40. One can only watch and see. But the listings are a bit...unusual.

Steve