As a buyer, it is safe to assume that in most cases the supplier will manage transport and be able to provide a total delivered price to your chosen destination.
As a supplier, for smaller items it is worth shopping around for the best courier prices. They will generally need both the originating address and the delivery address and dimensions. For larger pallet items, groupage companies offer more competitive rates and are worth contacting. Check your local Yellow Pages for companies within your area. Alternatively try the international carriers such as TNT, DHL, UPS