[GasHouseGang]

This weekend I picked up some Gartlan 3" plates, baseball card sized porcelain cards, and some flat 3" porcelain disks. I thought I would be able to just look up these items on Ebay. But the problem I encountered was that most of these items are signed by Gartlan, or Gartlan and the artist. One of the 3" plates is even signed on the front by Rod Carew. I couldn't find any of these items on Ebay that were signed. So my question is what is your best guess at value with the added signatures? Did they produce a limited number that were signed? If so, how many per item? I even picked up a George Brett 3" plate that says it is 1/1 and is marked as "First Piece". Any help you can provide would be appreciated. I've provided front and back pictures of some of the items.