Who says that buying a new PC has to be expensive? Sure, you could go to your local big-box store and have the salesperson wow you with the latest, greatest and most-expensive computers in the store. But, you don't have to go that route because GamerTVNetwork has five computers to recommend (one each for everyday use, gaming, multimedia, schoolwork and internet). The best part: each of them cost less than $500 (before monitor, of course).
His gaming PC listing seems to be widely unavailable.
I wouldn't game on any of these. And my 3 year old €1000 laptop makes a better gaming pc than any of these likely will (not to mention my actual gaming PC).
I know my laptop was more expensive but prices have surely come down enough for a comparable machine to be half price 3 years later.
In short, spend a little more. It'll surely benefit you in the long run.