I am about to upgrade from console to a gaming PC, the thing is I am a newbie with computers, I don't know anything about them. I have saved about 750 dollars up. I don't plan on streaming or editing videos I just want to play at the highest resolution I can within my budget and do college work on it. Is there a good prebuilt one anyone can recommend? Hell, even a decent used one you've seen on ebay or something would do. Any advice you guys give would be appreciated.