About the cost of the PSP :
I guess anyone on this forum who has tried to assemble such a kit (should be everyone .. <img src="/images/graemlins/grin.gif" alt="" /> ), knows for certain that the PSP is not expensive ; just getting all the components is more expensive ... I know, I did try...

So, add manpower, etc... and the retail price (27$ IIRC) wont look expensive at all.