That was my first thought as well.
Handled repeatedly might be an understatement based on that turn line.
I drug out my 1950's S&W's (well worn) and they are silk like smooth where your pictures show 3rd world level machining on the recoil shield. They also display less turn line after thousands of rounds but pictures can lie as we all know.
Maybe I'm smoking crack, but that turn line on a "unfired revolver" is a little bit disturbing. I would investigate thoroughly before buying that story.
I'm no S&W guru so take it for what it's worth.
ETA: post a link to the video OP, we'd like to see it.