You just have the escrow and explain your issues on shipping the the items to you. The person who handle the thread can be assisting you.
Most of the time, the sellers/OP on those sections are trustworthy for collectible items and they are the one that will handle the transaction and the escrow themselves. Just see to it OP that you are going to look first with their trust feedback before making a transaction.
The pictures there are already included and there are some raffles that you may want to join. I think you have now found the right section and you can lock this topic now.