You know how to make the connections and find the buyers online without standing in a crowded room with 1000 people screaming the name of a card. You point people to your cart and they buy from you.
You sell what you want for real world currency (no fantasy land fun-bucks, just money you can spend on anything.) You list the goods and you find the buyers. We pass the transaction to Paypal and they handle that part.
You set the price and we take exactly 0% of every transaction. How's that for improving your margins? We thought you'd like that.