It seems to happen fairly often. A quick note about a card or two turns into a much bigger trade, especially when you are trading for the first time. This trade with Paul over at Phungo started out with Paul asking me if I was interested in this Matt Cain Heritage black border card:
But it didn't stop there, all of these were included as well:
The Cain was great, the Phungo cards are better, but this card was by far the best of the package and completely unexpected.
Thanks for a great trade!