no, not worth it at all, just like bignastyid said, there is no warranty AND its over priced.
people on craigslist are absolutly out of their minds when it comes to pricing gaming computers when they are used 2 year old technology. theres quite a few on my local cl based on 4xx/5xxx cards and gulftown stuff and they still wont budge from $700-1000 even if you contact them and explain the logic and the fact that you have cash
these people are scumbag manipulators preying on people, i always flag computers that are inappropriately priced