How much should I sell my [HP H8-1414] For?

ACTechy

Distinguished
Without those components...$110. The buyer would have to go buy those things and reinstall it themselves. Nobody is going to want to do that, next to owning a new machine. You're basically selling a case and psu and a used CPU.
 
I'll be a little more generous than ACTechy and say up to $200 depending upon the case and PSU but without an OS (or at least the recovery disks) ownership becomes somewhat problematic and as pointed out, not worth it for most users and those that know how to get around the issues presented wouldn't be impressed with the machine's capabilities.

I would suggest parting it out as a way to get more of your investment back