My dad and I just bought a fireproof Sentry safe from WalMart for 400 bucks (on sale) to share and use in his home. It is Sentry's top of the line model with electronic and/or key lock. It is supposed to be 14 gun, but in reality we can only get 10 in there and we had to forego the use of the shelving and lock box to make room (Dad has a bunch of trap guns with 30-34 inch barrels, if we only had a few of those, and the rest were rifles we could use the shelving and box). It took 4 guys to move it into the basement (675 lbs). For the price it isn't bad but if you have more than 10 guns, or want something fancy for putting out for show, I would spend more and get a larger safe.
Funny, we never had a safe when I was growing up, but now that I have a little guy, Gramps insisted that we get one for his house.