[Arizona 911]

I am going to sell or trade the 964 turbo S tail and decklid off of my SC. I would like to trade for a stock decklid & grille. What I am not sure about is how to handle the shipping on the trade. Does each party cover the shipping on the item they are sending or what they are receiving or do I cover the shipping on both? I want to be fair to myself and the other party and thought I would ask here before I put an ad in the parts for sale section. When shipping, is it better to separate the tail from the decklid or keep it all together? I want to make sure it arrives to the new owner in the same condition I send it. Thanks