This is the FAQ section of the website, it contains many threads in regards to the questions you currently have or may have. I suggest you invest the time in going through this.
If you choose to ignore this advice and not read, dont expect to much help or support, members of this site will only spoon feed for so long.
As for your inqiuery about an m9 and m16 for not to much money, dont count on it. In most cases cost reflects quality.