My budget is 500$ I also don't know squat about computer hardware so no making one myself. I might end up making a toaster by accident.
Computers are pretty easy to build. Ever added RAM or changed out a video card? It doesn't take much more to put together a computer. There are several tutorials for it online if you're willing to do the research. Honestly, the hardest part is making sure you have everything you need and that everything will work together. But again, with a little research, that's not a big deal. You can easily build a computer for half the cost it would be from any of the major manufacturers.
Of course...you'd have to be willing to actually do work and research on your own...
Which can be a daunting task for someone that's never done it before. Like the woman who contacted me yesterday because her computer wouldn't turn on.
The power cable in the back of the monitor came loose.
Or the woman that was almost yelling at me when I told her we were replacing her monitor with a newer larger flat screen. She got all hysterical because she didn't want to lose her information off of her hard drive.
Or the superviser that calls the Maxtor external HDD's "Farwyers" (Firewires). "Can you grab me one of those farwyers so I can copy something onto it". Only 1% of our computers ever have a firewire card on them and the drives now all use USB connectors.
Incompenetent people are every where and there is a lot of them.