just about to raise this as well, and I actually currently have an order stuck at customs from them.
I usually source my models from the two Canadian stores, westcoastdiecast and mv400, due to their better prices: MSRP+10%off plus free shipping, this usually gets you NG/PH widebody for about $50 flat, compared to US retailers which is around $55 at least (and these small differences add up). I buy relatively a good amount, like around 20 models a month.
I don't know what's gonna happen with my order, but if I'm forced to pay any extra it will be my last order from them unfortunately. Sadly US retailers will raise as well which means NG/PH will be in the $60 range which is just unnecessary so unfortunately my plan from now on is forced to be sourcing models entirely from China and have myself/my friends bring them over.