If you are that "flexible" keep in mind that there are five states with no sales tax at all. And in the others there are some legislatures that have not yet considered this "illegal" way of filling their coffers. Even in the states that do enact such a "controversial" law there are still hundreds (if not thousands) of merchants who are small enough to not be effected by the $10,000 (or so) threshold - [or large enough that they are willing to take a chance and fight - if necessary].
My advice [for whatever it's worth] is to diversify as much as possible. I (personally) earn a good income, as an affiliate, from the travel sector, which has always dealt with taxes; and they are not shutting the doors on anyone. As a merchant, we are still "small enough" that we won't reach nexus in these (backward thinking) states for another year or two. A good portion (the majority) of our income is derived from direct sales - and our "home" state is Delaware, with zero sales taxes. Our manufacturing plant is in Illinois and we have always collected taxes to orders shipped there.
It is still possible to earn a good living without Amazon, Overstock and/or the couple hundred other merchants who are "pulling the plug." Keep working to fight such legislation within your state, but don't quit because of it passing - or not. Be informed, be alert, be diversified, and work smart.
Bill - Remember: If you are too busy to laugh you are too busy.
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