Interestingly, I had an odd experience with an Amazon seller based in China. I purchased an item, cost about 300 dollars. It shipped promptly from a warehouse in the U.S. and I needed a couple of small screws due to a mistake on my part. They were very gracious and said they would go ahead and arrange for the items to be sent no charge. After about two weeks, not only did I not get the promised shipment notification, but the items sale price had changed "significantly". in writing back asking what happened to my missing parts, I inquired about the almost fifty percent price decrease, saying at the end of the note, "can you help me out here".
They sent a whole second item as a gift.
My point is that I am finding, at least with overseas sellers whose only access the U.S. customers is Amazon and E-bay, they often seem very eager to retain that market and desperately rely on good reviews. Begging for good reviews in more like it. They were very happy to be rewarded with a favorable review.
Another interesting tidbit. Go to Alibaba and look up the item you're contemplating purchasing. I found the item that I originally bought for 300 dollars, wholesaled for 50 - 60 bucks depending on the quantity. Of course, you have to include shipping, warehousing and fulfillment costs but still and all, they pay way less for this stuff and that seemed to explain why they found it easier to send a new one than a few missing screws.
Several times I have found the same item on Amazon with a different name logo, that I can buy from a major US supplier with their logo. The item, packaging, instructions and specs are identical. In those cases I have found that Amazon is very accommodating in accepting returns and replacements.
I guess we have to do a lot of homework when shopping online.
73, and stay safe,
David