As noted, it's no different than going to a real store - there is cheap stuff and there is good stuff. It's up to you to figure out which is which. I buy plenty of motorcycle-related items from Amazon and never had any problems but it requires a bit of "looking." And Amazons "best deal" has nothing to do with best quality...
FWIW - made in China is just like made in any country; there is crappy, cheap stuff and more expensive good stuff. China can make a product as top quality as anybody else but Western-world suppliers often source the cheapest version to make the most profit. Heck, you can buy a $79 Chinese violin that's basically junk; or a $5000+ Chinese violin that has won international violin competitions. ;)