If purchasing multiple items:
To get combined shipping you must use the shopping cart. Shipping will auto adjust when you hit the purchase now button (there is still one more screen before you actually purchase and pay). If using a smart phone or device with an ebay app, you must go to the website instead of using the app, as it does not always work with the shopping cart.
Shipping discounts are as follows: You pay shipping for the first item and each additional item ships as no cost as long as you use the shopping cart.