I myself was going to ask that, As I'm on the look out for a graphics card for my mac, the prices on ebay are just silly, plus I'm new here myself, and wont have access to the buying and selling part till next year :/I guess we should have like a thread here just for selling/buying.
We recently created a sub-forum for collectors items. Ask nicely in the right place and we might consider doing one for PPC.Selling outside the Marketplace. All threads offering items for sale or trade or for free, or asking to buy or receive items must be posted in the Marketplace forum, which is accessible only to qualified members and subject to additional rules; see the Marketplace Rules for details. Members not eligible for the Marketplace forum may not start threads elsewhere for such purposes.