I have an old DELL Inspiron 530s that I was using as a PLEX server. It recently got replaced by a ThinkCentre and I wanted to look at getting rid of it. What is a fair price for this machine? I upgraded the CPU to a E8600 3.33 GHz processor and upgraded the RAM to 4GB. It wouldn't come with a hard drive, but does still have the Vista key on the label, should anyone want to install it as an OS. What would be a fair price for this machine?