Share your insights or perspective on the financial matter presented in the input.

What's an economic explanation for why greeting cards are so expensive? 
It'll all about the marketing. If you don't get a "real" greeting card for that important birthday or anniversary or whatever, the recipient may thing you're being cheap for using a card you printed out yourself. So you pay $6 for a card because you feel like you have to. Hallmark advertises with those sappy TV commercials for a very good reason. The margins on the product are sky-high, and they spend a good chunk of that money on marketing the product. Perfume is the same way: super cheap to make, low barrier to entry, and the popular ones command a high price.