By not doing anything you have what economists call "opportunity costs." It's the money that you are not collecting. Given your list, there is not a lot of money there and sentiment can mean a lot. In my case, I have had duplicates that brought as much as $18,000 for a Gobrecht Dollar which I upgraded. A few thousand was not unusual. Therefore letting those sit was a significant opportunity cost.
Actually Chris, I have stopped getting any more Washingtons. A 1940 - 1964 Registry set, as well as an A (includes 1932 - 1939 and 1965 - 1985), a B and a C 1940 - 1964 raw toner set(s) as well as some raw overflow seems to have quenched my need for any more Washingtons. At this point I'm seriously contemplating selling about 2/3 of the slabbed coins as well as the C set.
This is the approach I am taking now with my duplicates of even silver world coins. I try to trade mine, but it’s an opportunity to turn something I don’t want into something I do. Keeping that duplicate $5-10 coin is $5-10 I don’t have for another coin. That being said, I generally keep all duplicate world silver coins. Because I’m a hoarder...
Start with the blunt and pointed date then look for other known varieties. Photos of every variety exist online. If you strike out in your search start at the CONECA site and roam around.
I've always enjoyed seeing your "comparison" threads for the Washington toners. Personally, it wouldn't bother me if you had a "Z28" toner set. Chris
And you want me to do this with all eleven coins? Or the coins that I have 23 copies of? I'm not getting any younger and I think I can have a lot more fun doing anything else!. Not that I'm going to check them before getting rid of them, but not so exhaustively.
Whenever I've had extras, they've always been low value coins so I just give them to my son. Never had an extra of a high value coin, so I'm not sure what I'd do.
Good thing, but these coins already belong to my adult son, so I just manage them for him and any disposition of the coins has to be approved by him.