Buying something that's already been owned and used has some risks - but most of the time, the rewards are greater. Second-hand stuff is also easier to afford. That's why most of my buying of anything that even approaches a "major" purchase usually involves buying used items. It saves money, and sometimes you even get a better product because a previous owner ironed out all the kinks before you got it. Of course, that's not always the case and you could end up with a lemon, but that could happen when buying new, also. And that's where this article can come in handy, in helping you learn what to look for, what questions to ask, etc.
Read some Used Rifle Buying Advice