Think also of the implications of tax free states (like mine - NH) surrounded by taxable states and how it can impact the 2nd hand market.
Typically newer Stern HUO's are only going for $200-300 less than NIB. If a buyer in a state with a higher sales tax (like RI for instance which I think is 7.0%) wants a NIB Stern Pro, they're probably looking at $5700 + $399 = $6,099, and yes I'm assuming a price hike for Munsters onward, ignoring shipping.
Meanwhile that same Pro in NH costs us only $5700.
So when seller in RI wants to sell, they may think that they can get $200-300 less and sell for $5800-5900, and they may, but not to NH buyers anymore. Conversely, for NH NIB buyers want to eventually sell, they can then ignore potential NH buyers and in theory could list the same game for $5800 (more than purchase price) and be on the low end of the RI market.
Just saying it can have an effect at areas near borders of tax-free states.