I am considering replacing my 1st Gen Mac Pro with a new iMac quad core 7i and I would like to get an idea of how much my Mac Pro is worth before I consider selling it. Places like Gazelle say its worth over $1500 but I find that hard to believe. I believe its the 2.2GH or 2.26 GH but I have upped the Ram to 12GB and I have 2 x 250GB drives and 2x320GB drives in there, also added Blue-tooth and I have all original boxes,cables, etc. I even have a newer Wireless keyboard and mouse that I will send along with it. It has Leopard and iLife 09/iWork 09. And the stock 256K nVidia Video. Thanks for helping.