Before my wife quit smooking (2005) I could get her a carton for around $18-20. That price has since doubled.
Around here, truck stops sell cartons for around $35-50, depending on your brand of choice. You can spot the tourists from up north because they practically empty the shelves. I've actually seen someone from NY throwing suitcases into the dumpster to make room in their car for the cigs they bought!
When I was driving for a delivery company, several of us drivers (myself included) were approached to haul 1,000+ carton loads from NC to WV for a nice chunk on change (I'm talking 3 loads would have doubled my yearly income!) Nobody took the offer, mainly because we didn't own our trucks, but it was DAMNED tempting!
Governments love them some cigs, considering everything over 30 cents/pack is taxes.