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I WANT TO LIST ALL THE CARDS I HAVE FOR 1973. HOW DO I SET UP A "LIST" SECTION ON THE SITE

HOW DO I CONTACT A BUYER WHO DID NOT SPECIFY WHICH ITEM HE WANTED ON MY SITE

I HAVE A BUYER WHO NEVER INDICATED WHICH ITEMS HE WANTED. I'VE SENT 3 EMAILS WITH NO RESPONCE. BUYER HAS PAID. CAN I JUST PICK ITEMS FOR HIM AND USE REGULAR MAIL? THE CARDS(2) WILL FIT A LEGAL ENVELOPE AND A FIRST CLASS STAMP WILL WORK. THE TOTAL SAL...

do auctions automatically expire? is there any way for the seller to change an auction to buy now?