I have been looking for one of these literally for years. They are as rare as hen's teeth and are usually pretty expensive (>$100). This guy was practically giving this one away for $31 including shipping. It is pretty much immaculate. I almost feel like I stole it from him for that price. Anyone who has ever used the Hasselblad knows that it is not the most ergonomic of cameras. It was primarily designed to be a studio camera and not a so much of a "walking around" camera. Its boxy shape makes it hard to handle at times, most especially if you use the A16 back (6x4.5) which I use about 95% of the time. Most times you hold the camera with the left hand and focus, trip the shutter and crank the film winding crank with the right hand. Unlike with an SLR, these are three distinct movements and require you to move your hand into a different position to do all three. The beauty of this bracket is you still hold the camera with the left hand but you focus with the right, trip the shutter with your left (there is an internal linkage which pushes the shutter button in rather than a conventional cable release) and all you have left to do is turn the film advance crank with your right. That is down from three things you have to more your right hand into a new position to just one. And all of this can be done without taking your eye from the viewfinder. It also has an accessory shoe which has the customary rails but also a 1/4"x20 threaded socket. Although I no longer have any shoe mounted flashes, it would be easy to put one on and just run the sync cord to the socket on each lens.
I may have to burn some film to day!
I may have to burn some film to day!