SnusPort Duties

Hi all, long time lurker first time caller. I was wondering, is SnusPort shipping delivery duty paid? I was thinking about putting together an order with them as the prices shown on their site seem pretty reasonable, but I wanted to make sure I'm not saddling myself with a large and unexpected brokerage bill from UPS. If the latter winds up being the case, is it worthwhile to make a smaller order to stem the bleeding from customs charges?

Thanks!