New or Used?

Collecting older postcards is a great way to learn a little history. One of the questions people ask is, should I collect new(unused) or used cards? Well for me the answer is both. By collecting a card with a post mark you can date the card easily. A card thats unused needs a little bit more looking into. Although with the different postcard eras you can usually find out without to much trouble.
More on this subject later.