Trading Card or Postcard?

Once again, I turn to you, the readers of Love and Capes. Con Season is approaching. Heck, there's supposed to even be a Wizard World Cleveland now. Just as long as it doesn't park on any other shows, especially Mid-Ohio-Con, I'll be trés interested to see it. Anyway, for the upcoming year, I'd like to have something new.

First, I toyed with the idea of trading cards. I figured I could sell them at each show, and then make the package available online. I though $1.00 a card might work. Anything less means making coin-change, and I don't know if anyone wants that. But the printing cost is pretty reasonable, and it could be a neat thing to do.

Then, I had another idea, which in a moment of "great minds think alike" also came across my Twitter feed to do an actual postcard. I could feature every city I'm visiting and have Mark and Abby (or Amazonia or Darkblade) hanging out in the city, with a "Greetings from [CITY]!" on them. But, if I did that, I think that they need to be giveaways.

I've got rough mock-ups for both of them displayed here. Click on either to see them embiggened. So what do you think? Do the postcard? The trading card? Both?