The only thing you might be able to harvest from the "dead" computer might be your Optical drive, and HDD. I wouldn't even harvest that PSU - it looks like a no name brand junk, and I wouldn't let it touch any new computer equipment - it may just fry your new stuff.
All the other parts - well looks like they can be donated somewhere, a school perhaps?
When the time comes - you can probably just ask anyone here at Toms again - i'm sure by December there will be better and cheaper products out there than the "sept" build.
I'm not really looking to Harvest anything from my New Paper weight, but I do need a PC (or I'm gunna freak out) prior to my being able to lay out the funds for a new computer. Rather than buy that exact PSU which I know is compatible with the PC and then buy ANOTHER PSU for the new build, I was hoping I could find a PSU that would work for them both.