Hi Clare,
Welcome to the site! It's great to have you here. The prices may seem very attractive, in fact, you won’t find anything cheaper, but the problem with brand-name goods that come from China is that most of the time they're either replicas or fakes. It's hard to guarantee that these suppliers will always offer authentic brands where advertised, or that they have the distribution rights. For that reason, if you wish to purchase brand-name items, then we strongly recommend staying away from Chinese suppliers. They're very good for cheap, non-branded goods, though. You're sure to get the cheapest possible prices if you deal with them. You can sell generic, non-branded products, say, cellphones on eBay, so long as they don't make any trademark infringements.
Other related posts that you might want to see:
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By the way, we offer resources on importing and shipping on our education area. You might want to check that out too.
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All the best!