Check out the Winchester safe's at Tractor Supply Company.. I picked up a "24" Gun one for around $650 and installed it on the third floor. Take the door off it when you go to move it, that will help.
I moved mine in with me and 3 other guys. It weighs a little over 500lbs
I know when I move out, the safe conveys with the house though. I'm not moving it again.
** I just wanted to update that I have insurance for my guns and valuable. You can get into any of these "safe"'s with the right tools and enough time. You need to ask yourself why you are buying it. In my situation, it's to keep the smash and grabbers out as well as kids away from the guns and ammo **
I moved mine in with me and 3 other guys. It weighs a little over 500lbs
I know when I move out, the safe conveys with the house though. I'm not moving it again.
** I just wanted to update that I have insurance for my guns and valuable. You can get into any of these "safe"'s with the right tools and enough time. You need to ask yourself why you are buying it. In my situation, it's to keep the smash and grabbers out as well as kids away from the guns and ammo **