Building a 'gaming' computer

[Demmonix]

Hi, I'm fairly new here and looking to build a desktop that'll be able to support Guild Wars 2... Sadly, I'm a poor student and have a budget.The parts would also need to be accessible in Canada.Preferably Bestbuy.ca/Futureshop.ca

My budget is 350$ BEFORE TAX

I need a :
Case & Power Supply
Hard Drive
CPU
Motherboard
RAM (4GB)

Forget about the video card, for now I want a computer able to do simple tasks until I can collect the money to buy a decent one (suggestions are welcome though )

Here are the speculated requirements for reference:
http://guildwars2builds.com/guild-wars-2-system-requirements/

 

[Demmonix]

Best answer selected by Demmonix.