Anyone who has ever bought perfumes via Ebay (or on the street as opposed to from a certified store) knows how disappointing is the experience of getting a dud, a counterfeit perfume that looks like the real thing for the most part, but doesn't really deliver like the real thing. I have already devised a very popular how-to guide on purchasing fragrance safely online, but usually the visual evidence is ever so much helpful. It has since come to my attention that several guys have actually created and uploaded Youtube tutorials on how to spot the fake cologne with side-by-side comparisons between the real and the fake. They often note how the seller of the counterfeits isn't some mass-store in China or Hong Kong and how the feeback might be rather alarmingly high sometimes! (Estimates speak of 1 in 10 perfumes sold being fake!)
For reference purposes and to put these helpful guides under one roof, so to speak, I am including the links to the videos here.
As you can see by watching them, fakes come in "similar" (but not 100%) boxes and presentations and they always involve popular fragrances from the mainstream circuit; it just wouldn't make financially sense to copy a limited edition or an obscure niche fragrance. With that in mind, direct your purchases wisely.
Armani Aqua di Gio: fake vs. real
Burberry London men: fake vs. real
Chanel Allure Homme Sport: fake vs. real
Chanel Blue: fake vs. real
Chanel Chance Eau Tendre (and other Chanels): fake vs. real
Chanel Coco Mademoiselle: fake vs. real
Chanel ~ tips on spotting fake/counterfeit Chanel fragrance
Creed Silver Mountain Water: fake vs. real
Diesel Only the Brave: fake vs. real
Dior Homme Intense: fake vs. real
Dior Mightnight Poison: fake vs. real
Dolce & Gabbana Light Blue homme: fake vs. real
Gaultier Le Male: fake vs. real
Gucci Rush: fake vs real
Juicy Couture Viva la Juicy: fake vs. real
Paco Rabanne One Million: fake vs. real
Related reading on Perfume Shrine: What can I do to protect myself from fake perfumes and scams?