Unless you really need some money I'd say keep them all. They aren't hurting anything (literally) and are paid for, at worst they're just taking up a few cubic inches in your house.
Pick the ones you want to shoot now, clean and oil the others and put them away, out of sight and out of mind. In a few years, if you ever get a hankering that you remember how much fun one of them was, it'll still be there.
I've done the inventory reduction thing more times than I can remember, but what I do remember vividly is sooner or later wishing I still had most of them.
