Wedding Invitations?

I need some serious help here! We are poor college kids with a lot of family. We are inviting about 300 people. I have been shopping around for wedding invitations and I can't afford any of them! I hate the printable ones you can get at wal-mart and I'm just not very artistic. Does anybody know where I can buy super cheap but nice (online) invitations! My colors are light pink and chocolate brown. Please help!