Right, a week later, and how have the prices changed? Quite a lot, actually.
UberPC Original Price - £5,023.82 26/04 - £4,660.20 -£363.62 
From last week:
Motherboard - down £15.87
CPU - down £31.72
RAM - down £23.50 (2 x £11.75)
HDD - down £115.15 (4 x £28.79)
BR Drives - down £82.25 (2 x £41.13)
Total for the week = down £268.49 RealisticUberPC
Original Price - £3,602.55 26/04 - £3,446.91 [size=1]-£155.64[/size] 
From last week:
Motherboard - down £15.87
CPU - down £31.72
RAM - down £23.50 (2 x £11.75)
HDD - down £28.79
Total for the week = down £99.88