I thought about mentioning that...it's fully possible that he never fired it. I have about 1/2 a dozen Smiths that I have never shot...and an equal number that I shoot constantly. I see no reason that the previous owner should make it right unless he offered a warranty on it (which I highly doubt.) That being said, it should be an easy fix for Mikey since he has the tool to access the rebound spring. Without the tool...major PITA. With the tool...his 15 minutes estimate sounds about right.
My only infraction is from a fight that you picked with me, and we got the same thing. Please stay out of my thread.