Personally, I would avoid anything being sold on Craigslist unless it came from a reputable dealer/business. You will probably not have any type of warranty coverage and I would not be surprised if most (if not all) of the software installed is bootleg since you will receive NO CD copies. Also, there is no guarantee this is a new machine. I would check around locally at REAL businesses to see what you can find. Or, my preference/suggestion would be to go to pcpartpicker.com and choose your own parts and build your own. Plenty of videos and write-ups on the web (YouTube, here and a multitude of other places) that will guide you through building your own system.