How do you know when you've bought too many?

Nothing wrong with it! Guys have vices, just like most women with shoes, shopping, getting manicures etc. If you're not out boozing and gambling away your retirement....I see nothing wrong with spending a little cash for a quality smoke from time to time. It's a great hobby, the tobacco is so much healthier than disgusting cigarettes, and man, it sure is a great way to spend a couple hours with some buddies!