S/H cost is clearly listed in our auctions, and includes the cost of listing items, accepting PayPal payments,postal supply cost, taking items to Post Office when needed, etc. The item is ready to go out the door as soon as your payment clears. Insurance is optional –we highly recommend it as we are not responsible once the item has been mailed. We offer combined shipping. Please, ask if your are interested in multiple purchase for combined shipping before you take a step for payment. Once you paid, we don't do adjustments.