Are you talking a fireproof safe with a combo (start somewhere around 250-300 for a 8-10 long-gun) or a steel box with a door and a key (stack on has them for about 100 for the 8 long-gun)? A safe will keep me out for a few hours, the steel "safes" by stack on will keep me out for about 20 minutes, even if it is bolted to the floor. If you aren't worried too much about fireproof and to use it as a deterrent to a thief of opportunity, stack-on is the place to look. Wally world is the most likely place to find one. I have seen combo one or two handgun safes for about 100 dollars, but I don't have any experience in them.