Why do you want them to be expensive? Given the highly subjective and personal nature of scent and attraction, I doubt that more dollars will bring you a "better" cologne. The illusion of taste and suaveness might work for you, however. Perhaps you're better off asking females, either here or friends in your real life. Although, if you're simply looking to spend money on useless shit to feel better about yourself, puddlemonkey is the thing to talk to!