I got a few more details.
The owner of the gun is active on a car list I'm on that has a guns sub-list, and I had posted the ad there. He tells me that the Commando runs fine, is fun to shoot, has a red dot on it on a mount he had custom made.
he wants to get rid of it because he lives in a place that doesn't allow firearms like the Commando without registration. Since the gun isn't registered it needs to go out of state or be destroyed. He isn't willing to flkout the law, so he'll trade it for my shotgun, even up, despite the fact that the Commando with a bunch of mags and the red dot are worth ~$150 more than the shotgun.
He's not sure if he can send the gun directly to my FFL, so he's checking with his FFL. We'll see what happens or if he back out. C'est la vie.