this is a trade off between cost and speed of delivery - shipping out of China I have the choice of many different carriers - for example I can use cheap (and slowish) China Post, or faster and $6 more PostNL who will also give me tracking - I give my customers the cheap China Post for free and charge $6 for PostNL

(in the near future if US mail prices go up I may be forced to charge US customers more, I may also have to raise prices to US customers if I find that Trump's sanctions start to apply to small packages and I'm stuck paying from my end)