Depends which airport you buy it from.
ye
Duty free stores are non regulated as far as hours they are open 24/7
yes but you cant buy them in duty free, get them from a shop outside the airport.
There are shops selling perfumes in Charles de gaulle airport. One of which is l'occitane.
Duty free shops are typically in the international terminals of airports.
You can get 5 cartons of marlboro cigarettes at o'hare for 168 $, which means 33$ per carton. One problem is that you have to have an airline ticket to by them. I usually give the money to someone with a ticket and they usually by it for me.
The Chennai airport taxi duty free home theater is cheaper compared to the other shops.
Dubai airport is open 24 hours a day, 365 days a year - as are the duty free shops
Lancome gift sets may be bought in the duty free airport shop of some airports. An example of such an airport that have these Lancome sets in the Auckland Airport.
Shannon airport
how many cigarettes can i bring into new york from dublin duty free shop.