Look for online sales to move off shore.
Have you ever had a package caught in a customs inspection because you tried to have it slip through without paying tarriffs on it. Have you ever had to argue with someone about what the package is and under what category it should be taxed? Have you ever had something just disappear in the system only to show up months later? Believe me, you'll be begging to pay the tax on a US shipment after just one international shipment like that.
I'm not saying I like the interstate taxes. I'm just saying that a line which says 7% is much easier than dealing with customs.
Import taxes, fee's, tariffs....