It is hard to get good deals on perfume and cologne. I would recommend that you go to the google page and click on the "shopping" tab. There you can compare prices to find the cheapest. You can also probably google free shipping codes online which are always helpful so that it is still a good deal.
You can check your favorite online stores for availability. That is a very popular perfume so you might also get a good deal at a local department store or pharmacy.
Try Walmart which has great deal on perfume that is legitimate and reasonably. Also, macy's typically has all perfume brands for reasonable prices and they often come with a free gift of some sort. Another option would be to look online at Amazon or find a discount perfume merchant that is legitimate.