I would keep it.  It's always good to have a spare and it still offers the same usefulness as when you bought it.  Maybe something another family member could use to get interested in photography.  I typically pass my hand-me-downs to my wife and kids when I feel the need to update technology.  In many cases the use you can still get from it far outweighs the money you might realize on the used market for electronic stuff.

My sixteen year old daughter likes to come along on range trips.  She shoots all of the guns I own and gets very respectable results with all of them.  She is only 4' 11" and weighs less than 110 pounds.  We took the 20sf this week and she was looking forward to giving it a try.  We shot Underwood 155 gr Gold Dots at 1500fps.  She thoroughly enjoyed it and can't wait for the next order to arrive from Underwood so we can make another trip to the range.  It looks like I am going to have to get her a G29 Gen 4 of her own when she is old enough for CCW!!!

While there are many good holsters in my collection, I am partial to the Crossbreed for IWB carry. 

Very nice Squid!  Welcome to the forum.

Happy to see another place where aficionados of photography can hang out. Such a great place.