The cost of getting the postcard is $5 + shipping. If you only pay $5, I will only send you a picture of the card.
This is because international shipping in Denmark costs roughly $5, and the card itself costs roughly $3. It's an expensive country with 25% sales tax.
As for the card, I'll write a greeting in Danish or English, and get stamps from the post office for you stamp collectors out there!
The card is usually a Danish royal family or landmark one.