Anyone know a pc website that you can build your pc from the ground up?

I'm looking for a computer website that I can build my pc from the ground up. with no OS and as little hard drive as possible. I do not need all that fancy stuff and a hugh 500GB hard drive. that is what makes the price go up. DELL, HP and others will only let you custom build your pc but not from the ground up. all of them already have to much stuff on them and i can not delete them to get the price to go down. the local computer store is a great because you can buy the parts for less but then they want $120 to build it which makes the price no better then dell or hp.