i know you're not parting out, but would you consider selling just the PC? i have two 24" monitors already and don't need, nor want, another keyboard, mouse, headset, etc. etc.
also, i would expect/want the Win7 media and serial/sticker, etc. so that i could do a fresh install.
for that matter, i'd rather just have a clean install of Windows with nothing else on it anyway (others might as well, just a suggestion).
all that being said, i'm a serious buyer but only if it's right for me. i'm sure you can appreciate that.
all the best and let me know.