The photo on the Piazza card is awesome and it's from an obscure set that was only available when you purchased a certain amount of either Sunoco or Atlantic gas, so I'm pretty sure I don't already have it. I have pretty much put my Piazza collection on hold for the past several years, but I might start it back up again.
Next, a couple of current D-Backs, C.Y. and J-Up.
An Erubial Durazo Rookie Card.
Finally, a Matt Williams Heritage card