The price seems about right for a snail drum and a loader. But the seller also mentioned a shaped canvas bag. I couldn't get the pictures of the total assembly so I can't talk much. But if this is an original carrying bag for a snail drum, then this might have been a deal. Simpson sold one a while back for $1000. Then there is the case of whether or not there was a dust cover which goes for about $200. Then there could be a fitting for the machine gun. Was that there? That could be worth extra bucks. Too bad that I couldn't see the pictures.
Big Norm