Bad, bad, bad idea. Go and buy a Ruger 10/22 if you want a cheap gun. Works amazingly, tons of fun, you can buy a box of 1000 rounds cheap at Wal-Mart, it doesn't break, and there are tons of spare magazines on the market for it. If you hate .22 caliber rifles, you can get tons of really high quality bolt rifles for less than $500. Some guns that come to mind are the swedish K31,mauser series, and the springfield 1903. Some of these even have been re-chambered into more common NATO calibers. If you want a semi auto, you can get a M1 garand from the CMP for ~$600 (before transfer, shipping, etc). Just stay away from the kel-tec brand. There's a reason it is cheap.