I am very much a revolver guy and picking one for this thread was tough.
Since I don't own any "safe queens", I thought one of the working guns would be the way to go.
Not rare or special, but one that was fun to get it right.
A plain jane Model 10-5, with Robar NP3 finish (including all of the parts) and a basic set of Pachmayr Grippers.
I initially thought I had got an excellent deal. It was pristine and looked to be unfired. Internally it was perfect except for the dried up oil that S&W had put in there decades ago. It has an import stamp, so it left the U.S. and then returned.
However, closer examination revealed why it was priced low. The barrel to cylinder gap was huge. It may have failed some inspection and simply lived its life in an armory somewhere.
So I had the barrel set back to correct the B/C gap, polished the trigger face smooth, and sent it off for the NP3 finish. It now serves as a Kit Gun.
It is no longer in unfired condition.