This (I'm sure, as I haven't read all of the reply's) will beat most if not anyone... £7.50, each... For 8 consoles.... Replace the blu Ray drive on 2 (40/80gb hdd's) on 3.XX (lower than 3.55) and in 2.65. Then a good old BC (4usb ports, 60gb HDD) running 3.15.... Now the only problem with the 60gb one is that it flickers... So it will need a good old leaded bga reball of the rsx
and as I know a mate that's learning.... I get mates rates as well!! XD
Plus the fact that I must have jailbroken at least 100 consoles.... I'm sure it's more but yeah xD