with a little help from my uncle i built my first custom gaming PC and it was a like at least £300($500) cheaper then if i went on say cyberpowerpc or something.
The only good deal i have seen for custom built PC's is from an English component site computer hardware, components, systems and peripherals at the lowest prices from IT supplier Aria Technology
. Although they do not advertise it much, they used to but it;s not mentioned on the main page any more, they will actually build a computer to your spec(basically what is in your basket) for £55. One of my friends used this site, they didn't install the OS but they did install all the drivers for the hardware and built it and everything, also the wiring i thought was very well done, they used those zip ties and all that to make it tidy( ok maybe you wouldn't rate 10\10 cable management but it was pretty **** good i thought).