There are no taboos, and I don't pay attention to Feng Shui. Modern times can develop rapidly, so don't be superstitious. But if you doubt it, don't wear it. Long-term doubt will make you depressed. There is something really wrong.
Some people frown at the word "second-hand". After all, second-hand consumption is not as common in China as abroad. More importantly, many people are full of worries and taboos about "buying jewelry used by others", just like meeting a new lover full of stories, which makes people afraid to love.