I am thinking of selling one and would like to stick to one caliber since rounds are so hard to find.
I'm trying to follow this logic.
You believe that since ammo is hard to find, you'll have BETTER chances of finding ammo if you only have one caliber that you can use?
Locally, I only see a couple of boxes of handgun ammo at a time in the stores. Sometimes it's 9mm, sometimes .40, sometimes .45, sometimes .38, sometimes .357, etc.
Seems to me that if ammo is hard to find that you would want MORE options as to the calibers you could use.