I have not checked to see about the values of this or the linked companies, however, this is a tool that helps you to build your own computer by selecting parts based on your total price points. The goal is to help you avoid sinking more of your computer budget in upgraded parts which will have less of an impact than spending the same money elsewhere.
My goal in sharing this here is that the computer industry is generally affiliated with silicon valley values, so building a computer instantly cuts out at least one middle man between you and your computer, plus it is a good learning experience and you get a better value computer for the money.