I used to buy supplies from them all the time with no issues or unknowns. (Not pen kits because I found their quality in plating to be unpredictable, and the pen tubes weren't the same size as my bushings and drill bits). It was different this time. My last and final order with them was placed in March for some supplies, not kits ($700 order). I chose Air Express shipping ($175 - not the most expensive option) to save over $100, it took over three months to arrive. They said it was because of customs entering the USA. I'm guessing the tariffs were mixed in with the tax, shipping, payment commissions or prices because there wasn't anything to reflect tariffs on the bill and I never received a bill upon delivery.
Just my opinion…. These other companies sourcing through them doesn't mean they are paying the same price you will. I would expect they get better prices or discounts with the amounts they spend so to deal with the headache of arrival, tariffs and unknowns I'll just buy from a US company now. In my mind the little bit of savings isn't worth it.