Any sales taxes are determined and collected by eBay.
Yes, I combine shipping within the USA--$1.00 US for each additional item you buy. Check out the shipping tab to see what you will pay in your local currency. Be sure to pay as a single order or wait for an invoice from me to get the combined shipping discount.
International shipping is offered through eBay. International buyers are responsible for whatever eBay charges you for shipping and any customs fees or duties.