If i was you Banshee i would think about how much i can spend on character, what quality is bare minimum, got some concept art. Then I would make nice post (from template) and just give clear requirements and how much i am willing to pay for it.
All because price will wary with quality that you demand and with artstyle of character. For eg. some robots in flat armor would be much cheaper than more organic model that you want to have with bouncy physics and physics materials.