Thanks for the feedback!

I was thinking about being the "middle man" basically because shipping comic books has the problems you exposed.

For example:

- if I have 10 comics to swap, it may be that I will have to swap them with different users and having multiple shipments would not make sense

- comics can get damaged if not packed carefully. While this website would target comic book fans (who know how to properly take care of comics, shipment, etc.), the "middle man" would help in assuring that these comics are in good status.

I was looking at paperbackswap.com, it's a beautiful example of swapping system. Users post their books. When someone requests a book from them, they ship the book and receive 1 credit. With that credit, they can get a book from another user.