http://nypost.com/2014/07/14/state-confiscating-thousands-of...
tl;dr - Missouri $ .17 tax per pack, NY $4.35 (+$1.50 NYC) per pack.
Or if you're in my area and need cigarettes, you drive to the nearest reservation and buy them tax free (which like you point out, makes a huge difference). This one is a little bit more of a legal gray area, but that never stopped anyone.
Good times all around.
See here for an amusing example of this: https://translate.google.no/translate?sl=no&tl=en&js=y&prev=...
Swedes buy cheap booze from Finland.
Finns buy cheap booze from Estonia.
Estonians buy cheap booze from Russia.
[1]: http://epp.eurostat.ec.europa.eu/statistics_explained/index....
[0] that isn't marked up for other reasons, such as Whiskey
- Pennsylvania has relatively strict laws regarding alcohol, so just over the Delaware border you'll find a lot of these "border shops" (although I haven't heard that word in the US); - my wife was born in a dry county in Arkansas. Just over the county line (which happens to be the state border with Oklahoma) there are drive-through liquor stores. You can go, get your booze, and turn right around and go home.
This kind of airline price discrimination, however, is not legal within the EU.
http://www.npr.org/blogs/thetwo-way/2014/08/22/342422415/egg...
There are people buying diapers and filling trucks with them going from one country to another because of the large price difference between the countries.