No, I think the Short Shooter outfit is the prize.
You show the 5.5" heavy barrel for LR, which is pretty much the standard these days. A new one is $232.25 retail from S&W. But one like yours with the same sight as M52 sold for $300 on the S&W board.
On the other hand, you have not only the 7.375" Short barrel and magazine but also the matching lightweight slide and muzzle brake.
A similar outfit was $1000 on the S&W board.
That would be the place to discuss and sell your stuff.
http://smith-wessonforum.com/forum.php