Worldwide shipping is always free in the Social Store.
You don’t have any extra cost if you are the lucky one selected in the social shopping. Whatever you added to the crowd shopping is your final total purchase price. No extra costs, no hidden fees.
Same rules apply to the Store side. The Marketplace price is your buy now price. Shipping cost is included. If you use and exchange some of your discount until the Best Price, that is also the final total price you need to pay.
Well, now you know what makes a PRO shopper. Good luck and happy shopping!