Don't get me started on this hardware / costs thing again
As someone has already said you can get a great deal from the red banner at the top of the page and there are others here with great prices too.
If value is your main consideration when purchasing a server then you have to factor in support too. If the hardware or network fails or you have some intermittent problem would you be able to contact and converse with a support droid in Atlanta as easy as you would in the UK?