Most of my Books ship free. There is a reasonable shipping charge on most of the other items.
I've found that usually USPS Priority shipping is the least expensive way to ship anything other than books. I no longer will ship international. I've only charged exact shipping on International (I don't know exactly what shipping through ebay costs)- but I get dinged for shipping overcharge on every International I've ever shipped.
I accept PayPal only.
I take returns within 30 days, though I prefer sooner. If it's broken, I need a photo, and I need the item returned. Any questions call ebay please.