If you purchase an independently reviewed product or service through a link on our website, WWD may receive an affiliate commission. Don’t even bother looking: Guerlain’s $660 Vanille Planifolia Extrait 21 perfume simply cannot be duped. This sentiment is shared by hundreds of Reddit users and fragrance snobs, who regularly post statements like “ Guerlain DNA is pretty hard to reproduce” and “ Guerlain ’s private and extrait line cannot be duped, in fact any Guerlain [scent] probably cannot be duped as they manufacture and procure their own ingredients.” As beauty experts, we concur. While affordable replicas of the Vanille Planifolia Extrait 21 do exist, not a single one comes close to cloning Guerlain’s meticulous attention to detail, perfected across centuries. Guerlain Vanille Planifolia Extrait 21 50 ml Personalization options available Price upon publish date of this article:  $660 Courtesy Guerlain The luxury perfume’s lucky number?…