Should I buy this pc?

Nit, you would probably be better off watching some tutorials on youtube and ordering your own parts (or buying used) and building it yourself. For the $1000 price tag imo this sounds like a ripoff kinda. http://pcpartpicker.com/p/N2zcsY For ~900, you could get a rig with just as good specs (or very near, negligible in actual performance), and if you buy smartly and when things are on sale, you could probably save more and still have a snazzy gaming pc. Just my opinion on this, especially considering that it's a used system.