Uncle Billy, the rules sez, if buyer and seller live in different states, selling a gun must involve transferring via a federally licensed gun dealer. You happen to live in a very gun unfriendly state, so there will be additional local laws regarding what types of gun, how much magazine capacity (probably a 10 round limit), waiting period after filling out the paperwork and going through the background check, etc.
If there is a gun store near you, stop by and ask for the lowdown on local buying and ownership requirements.
In your situation, with a limited budget, in your particular state...get yourself a Mossberg 500 or Mossberg Maverick 88 12 gauge shotgun with an 18.5" (riot gun style) barrel. You'll have trouble finding them used with that type of barrel because of how popular they are as home defense weapons. New will cost about $225 to $250. That, plus a few boxes of buckshot. If you want a handgun, look for a police surplus Smith and Wesson model 64 (38 special), 65 (357 magnum), or 66 (357 magnum). Prices are typically $250 to $325 for these. If you like semi-autos, Smith and Wesson has a great deal going right now on their Sigma pistol. Similar to a Glock, and quite a bit different than the 1911A you know. Available in either 9mm or 40 S&W. Can be found for under $300 after mail in rebate. They normally come with two hi capacity magazines, but in Maryland, I suspect they come with 10 round magazines.