The seller can not always answer your questions. Work with the seller. Most transactions are easily done when both parties are trying to work with each other. There are a number of ways that you can handle a transaction between two people. Seller Sends item, buyer waits for item, then mails check.
Checks cross in the mail - buyer sends check, seller sends item at same time.
The first three involve a certain amount of trust to be bestowed on one or both parties, whereas the last involves someone else in the deal and provides another level of security for the buyer and seller. This is a widely acceptable position for anyone who is purchasing from someone they trust. If you order from a catalog, they get to charge you before they ship, etc. It comes down to trust, of course. Pros Cons Transaction happens relatively quickly.