$37 Sempron all the way, $45 mobo, $30 opt drive, $10 internal card reader bay, $40 case & power supply, $20 ram...scrounge a HD. I mean that sucks but it'd be fine for ubuntu. Then I go to 'Computer site USA' websites for shits n giggles and they've got dual core processor systems w/monitors and printers for $300

And the 'egg wants $30 s/h...
It's not like the good old days when building and oc'ing could save you tons and tons. Although, you could save a lot if you were building a massive rig...as for some reason those are rediculously overpriced at places like best buy when you do simple math on the components being used.