Recently I visited my favourite perfumeshop in my country and found that there were lots of top brands for very low prices. I bought few bottles such as , Loewe Esentia and pour homme, Moschino Pour Homme, and Cartier whole range of products priced below 15$. Then I was curious to find out why they sell it for so cheap; 1) these are not popular in my country and 2) some are discontinued. But these are in good shape and high quality. My concern is, how long can I keepthese perfumes and whats the quantity I should keep?