I'm pretty new to the hobby myself and couldn't see forking out big $ for a true safe at this time.
I went with this $75 Stack-On cabinet from Wally World. It locks and hides away very nicely as long as your willing to cut out some sheet rock between studs.
I personally think its a fantastic value @ $75. Other than fire, I think it's as good as a safe. Kids can't get in it and a thief would have to spend way too much time to get in it.
It looks so much like an electrical box, I slapped some high voltage decals on it to fool the fools.
Depending on how you configure the 3 supplied shelves, It'll hold 2 long guns and a pistol or two. Although I don't seem to need it, I also threw a $15 rechargeable dehumidifier in it.
I have a new weekend project for my walkin closet.