Maximum PC

Hey everyone, I've been thinking of building a PC just so I can get some experience in building it and all the knowledge that comes with building a Desktop. I also hope to get a mediocre/decent Desktop out of it.

So I have a Budget of 500 AU$ MAX (being in Australia) and I would very much prefer if all the parts were purchased from one website Umart Website

I'm looking for a very general computer that will be able to play games on hopefully medium settings or above (games like Skyrim,Wow,GW2,Diablo3 and those type of games)

I only need a Desktop built I wont need operating system, screen,mice,keyboard or anything else like that.

Case doesn't have to be anything fancy at all, would actually prefer it if I could save money on that and invest more in other parts.