I don't know why anyone would buy from a place that sells nothing but Chinese junk. Well I do know: price. It's fine for latex gloves and whatever trivial stuff but if it has a motor or is something my life could potentially depend on, but those things somewhere else. You'll buy jack stands once in your life and use them forever, no reason to try to save a couple dollars on those.
Let me repeat: if the item has a motor in it or is something you really have to rely on, whether or not it's your actual life at stake as it is in this case, do not buy any of that stuff from Harbor Freight. And yeah, I'm sure a few of you have gotten lucky with something from there but it simply isn't worth it.