If you own your home, build your own. For about $700 you can build one hell of a gun save...

You can do it in a basement corner out of block and put a hidden door on it and nobody but you will ever know its there. They sell mock-block paneling. Just block the room in, and put a door up that is faced with that paneling. Nobody will be none the wiser. Just watch for moisture. I need a small plug in dehumidifier in mine.

In a cabinet, it's like a dogs food bowl. All the goods are visible and in one place.