These kinds of products are not a good choice for selling over the Internet. But there are exceptions like books and CDs, computers and computer products. Any products that are known to be highly standardized, a specialty, not locally available, and not perishable, may be sold successfully over the Internet. Try to stick to these kinds of products when choosing the products you plan to sell. With a physical product, you are faced with the problem of shipping your product to your customer.
Shipping can be expensive.
Many buyers have been known to cancel a purchase when they discover the shipping costs that apply. And shipping internationally involves still other considerations - clearing products through customs, paying import duties, and complying with sometimes complex rules and regulations When considering a physical product, determine your major target market geographically. Research what shipping costs will be, the best carriers, customs regulations and import duties. One kind of service is to sell someone else's product. You provide the marketing, and get the customers - but let them inventory and ship the product and provide customer service.