Is there such thing as a Pentium 3 3.06 GHz? Maybe you meant Pentium 4?
With the specs of your computer. I'm guessing those components will still be around 1-2 years from now. Your gonna have to buy it sometime or later, because if you keep waiting for better stuff to come out, you're never gonna buy a computer then. Price seems fair for that computer with those specs. What monitor/LCD will you be using with it?