if he does play game then this is what i think, for a full system
AMD 64 3500+ Good overclockers, better than 3700+, extreamly good for there money too.
Asus A8N-SLi nForce4 SLi (Socket 939) PCI-Express Motherboard (MB-101-AS)
1gb pc3200 ddr 400, prefrebly performance from corsair, ocz, GeIL, but due to your budget, you may have ot settle for value ram, but form a well known brand like borsair.
for the video card, somthing like a 6600gt, or x800gto2 (alot of people say the X800GTO2 is a 100% succesfull mod into an X850XT PE, and there is an official guide on how to unlock the extra 4 pipelines of it so it has 16, and there very overclockable)for hard drive, at least 160gb, never get maxtor, seems like they have bad reputation, get either seagate as kenshinx said, or get western digital, i have a wester digital, and it runs like a dream.
i dont think you will need anyhting like a floppy disk drive, as there dead and burried now.
for power supply, i would reccomend somthing like a 450-500w psu from a well known brand like akasa, tagen (matt555 has one, maybe he can give you some info on it), seasonic<< they are amongst the bes ton the market i think, thread in the forums somewere, seasonic were top of any, with over %90 stability.