Where can I find cheap parts?

[Acoshi]

Where is a good place to get cheap parts. The reason is I would like to experiment and try to build my own computer and I don't want to end up spending more than $1200 on something that didn't work.

 

[jacktesterson]

Canadacomputers.com or NCIX.com is best in canada I find

Newegg or Googlegear in states