You might want to check
www.pricewatch.com. For systems already built look in the top left corner. Not many people build their own laptops though. If you are building a desktop computer there really is not much to it. If you feel you are up to the task there are plenty of people on this board that will help you. Also your local bookstore would have a few books on the subject. The one down side I would say is that I have noticed over the past little bit building you own PC does not save as much money for you as it use to. I used to get the best parts and save a ton. Now some of the X brands systems are dirt cheap and have pretty good hardware that comes with them. I went into Walmart the other day and was scared at the cheap computer systems they had there. If you need any help though I would be glad to.
Granamere