You can buy single cards for €3.25 each. I have 4 cards for €11 or 8 for €21 for you, including shipping in the EU. Mark your wishes at the comment section at the checkout.
You'll get them with matching enveloppe, so no hazzle in finding the right one. Plus, you can wright whatever you want, with a fitting enveloppe only your neares will know how you feel about them Greetingcards are totally hip and trendy, You're way ahead of the great mass if you send a greeting card. Who doesn't want that.