Ok, What is the cheapest desktop computer to play computer games well?

I have like a not that old dell computer with a lot of CD computer games and it’s kind of slow. It has a virus and its still its same qualities but i can’t do ANYTHING on it. I can use the internet though. Please send more virus’ to download please!

I am having a garage sale and I am not sure how much to mark computer games or game boy advance games. I have games like Rollercoaster Tycoon, Scooby-Doo, sonic, Barbie, Arthur, Nickelodeon games for computer. For game boy I have Lizzie McGuire, Simpsons and Mario. What do you guys recommend?

Can I install hardcore computer games on a flash drive without intalling on my computer?
So can I install hardcore computer games on a flash drive without intalling the games on my computer? I would like to play games such as Star Wars Knights of the Old Republic 2 The Sith Lords, Halo, Star Craft and some others? Can someone PLEASE help me?

I have a Compaq FS7600 computer and it is running on XP. I do not know the type of graphics card i am running on but i know it is pretty simple. I was wondering what computer games i can play on it that would work fine. I can play Empire Earth, Hit man and Age of Empires fine but i do not know about other games. I want to know i can play the games well before buying them. Please list as many games as you can. Thank you.