1. Most of customers find the good sourcing agent by themselves via google searching
2.Few people can get a good sourcing agent by recommend by some of their friend ,but if you are lucky you will meet a good sourcing agent recommend by anyone who you know .
3.Sometime you will see the advertising of some big sourcing agent company , you might be attracted by the content of their advertising poster by low commission , best service etc ...
4. What’s in my opinion is all of the good sourcing agent need stand the test of time and customer feedback.