Who can you afford to hire to clean and oil all those guns? No one, I know. So it does become obvious that you really can own too many guns. The key is that no one else should be in a position to tell you that you have too many. But if or when you decide for yourself you have too many, then you do. And there is no one competent to say you're wrong. Just as no one should tell you the same thing (especially a government jerk.)
So how do you conclude you might have too many? I don't know. I did conclude that once a few years back, and I wound up selling about half of the one's I'd accumulated. Sure, you may lose a little money, but then you've got cash to blow on other newer ones. And there are hints. I was in my gun room, digging for something. I pulled out a very nice 1950 target 4". I knew I had one, but it was perfect. This one had some signs it might have been refinished along the way. But I have no clue when I picked it up, how much I paid, or from who. It was one of those uh-oh moments. This stuff is happening again.
My gun show Partner has an affliction. Old Joe feels an obligation to clean and oil all his guns once every 6 months. It takes him a whole day according to him. But the last few times he did it, it ended up running into a 2nd day. He's starting to talk like he's considering selling off one or two of his very best. His reasoning is they're too good to shoot so someone else should have the pleasure of shooting them. He might never sell them because he's pretty sure he'll never find others as good. I pretty much can convince him not to sell. I just beat on him for a while and ask what he'd do with the money if he did sell. He can't get any interest if he puts the money in a bank. And he'll probably have enough money to pay for lunch tomorrow either way.
And I'm worried that in the last 10 years I've only shot one K22. Its the gun of choice for me to take out. I have no idea why I still have others. If I could sucker Blake (one of our gun show buddies) into parting with his 2nd model, I'd probably make that my gun of choice. Maybe I could convince him into some trade. Most folks here would probably like to have K155, my current first line gun. Why do I own all this stuff? I guess because it doesn't eat anything, and it doesn't fill the stall with manure.
Especially if you have a son like I do. He is VERY happy that dad owns the ones he has. 
