One time i ask my friend who is a pc technician and owns an internet cafe to assemble for me cpu minus the monitor and the dvd. i gave him 16k that is year 2005. He gave me celeron 2.40ghz, 250 RAM video card 64mb, 40hdd, ecs mobo that i think is the cheapest price he admitted that he gave me used casing and psu so it's ok.
Later when I open the casing only the mobo is new I also doubt if the processor is new.