Doba has been the topic of several discussions here in the forum. Have a look at these related posts:Link hidden: Login to viewLink hidden: Login to view
We don't recommend sourcing branded goods from China even if the supplier assured you that the goods are authentic. You can request for a proof of authenticity but even that can be faked. Since a vast majority of goods coming from China are fakes/replicas, the best way to avoid authenticity issues is by not buying anything branded from Chinese suppliers. They are best suited for cheap generic/unbranded goods. These goods are manufactured there so you are guaranteed to get the best price.
We have some great articles on importing from China, dealing with Chinese suppliers, etc. and you can find them by clicking on the 'Education' tab on any SaleHoo page.
All the best,