AliExpress is an online marketplace that has 9.5 million different products supplied by over 10,000 Chinese exporters and manufacturers. You can buy wholesale craft supplies online including sewing supplies, scrapbooking and paper craft supplies, jewelry making supplies and much more all at heavily discounted prices. Most merchants offering free worldwide shipping and items can be bought in bulk or individually.
Amazon is the largest online retailer in the US selling everything from books and movies to toys and clothes. They have a huge arts and crafts section and they deliver the majority of their products worldwide with free shipping internationally for orders over US$125.
Lili of the Valley is an online craft supplies store based in the UK that supplies innovative products for paper crafting. They offer free worldwide shipping and orders are dispatched within 24 hours on weekdays.