Fun little juxtaposition that used to exist (probably still does but I don't know for sure): the state of Washington has no state income tax, and the state of Oregon has no sales tax. So the town of Vancouver, Washington sits right there on the border. People would buy a home there to establish residence in Washington, but go over the bridge into Portland to shop, lol.
In fact, I once bought a piece of electronics in Washington when I had moved there FROM Oregon, and they told me if I still had the Oregon driver's license I would not have to pay sales tax, as an Oregon resident.