You should only really attempt this if you know very well the quality of these types of products.
Once you have found manufacturers that you think look pretty suitable you would be wise to have someone in China check them out for you.
Make sure that you have signed confirmation samples with you and in the factory for quality reference as well as a technical document outlining clearly what you expect.
Finally have an inspection company check the production prior to it leaving China and prior to releasing payment. You will find that every factory will have a defect rate but you want to make sure that this is minimized in what is sent.
Quoting from [Ahmed Nagy]:
Hello,
I want to start importing Flash Memory and PC accssories from china, i want to know how to start and how can i find trusted supplier. because i found that i have to send the money first then i receive the goods how cani make sure that i won't loss my money.
thanks