One time, in the early 80s, I lived in a county where the sales tax was 6.5%, but bought a car in a neighboring county that had a 6% sales tax. I went to the neighboring county, not because of this incredible break on taxes, but because the neighboring county was just a few blocks over and that's where the car dealership happened to be located (Ok, I'll admit it--at the time I wasn't even aware that different counties had different levels of sales tax.). Well, anyway, the deal was done and all was fine, except that a decade later I got an unpaid tax bill that involved several hundred dollers in fines and interest, because the state had just gotten around to doing an audit of such tax matters, and found out that the (by then defunkt) car dealership had applied the tax rate of their county, rather than that of the county that I lived in. I tried to fight it but it was impossible. They said that I should have done a better job of checking the math in the contract to make sure that the right tax rate was being applied. I still don't know whether this applies only to cars, so now I never buy anything out of my county that would leave a paper trail.
If it happened now, I'd just write them a check, but at the time I was unable to do so and interest and penalties accrued each time that I made a partial payment. That was when I learned the lesson that even honest, hard-working, tax-paying citizens can be screwed by the system. The lesson was reinforced a couple of other times over events not unlike those of Dragyn.
Good luck Dragyn
Michael