Fans and Heat sinks and Power supplies sometimes come bulk w/ cases and stuff. I just got a case; it came w/ a power supply. In the CPU/Mobo combos, fans come w/ "free". Assuming that he bought boxed stuff, screws and stuff would come w/. That would explain partly why his cost is so high; boxed parts are more expensive. But that's only part of it. It doesn't explain how it ended up costing so much.