For that purpose, you’ll need to make sure the quality is good by either ordering the sample yourself (which can be expensive) or hiring someone to check the quality for you in China or the country you’re ordering from, best would have some trusted in the manufacturing country, now to properly assess the quality you’ll need them to check certain areas (suppose in Amazon market the product had issue may be with hinges or that the bold comes off, maybe the plastic/material feels cheap) you can focus on these certain areas and make sure that your product don’t have such issue so you can prevail among other sellers.