Please, I want to ship in some products from China from about 3 different suppliers but I'm thinking of a way to merge the goods so I can pay less for shipping. Instead of having them ship it separately, can I link them and make them send it in bulk?

And, if you have any idea of how to detect if a supplier is legit that is, no scam, fake product, low quality, etc, please you can orientate me too.

Thanks in advance.