From the parts laying around here I made my athlon x2 rig, which is far from good comparing to that...
It depends how long you have been collecting stuff and how often you upgrade. End of last year i gave me friend a pc for free, he just paid the shipping costs. It wasnt very good: Ashrock mobo, old no name pc case, random crappy psu, e3300, 4gb ddr2, 250gb hdd and 240gt. For him tho its great because now he has a pc of his own and it can play games too. We have been playing killing floor, left 4 dead + 2, dead space 2, borderland 2, worms, dead island and more. He tells me and the games look ok on it, but he does have a low res tv, so this makes life a bit easier on the pc and he is used to console graphics.
Since my recent upgrade, better parts get demoted to other pc's, so all the computers get an upgrade. Except the last pc in the chain, which parts get put on a shelf, until i have enought parts to make another pc. Now i have another pc i don't know what to do with and out here there is basically no demand for old pc parts. So i will sit in the garage loney until i get around to getting rid of it or like others, just sit around for years then get binned.
Believe it or not, i tried to give it away, but they said they didnt need it: