Exhibit Card Questions

[rdixon1208]

I picked up a few Exhibit cards at a show yesterday and I really like them. I was thinking of adding a few more, but I have some questions about authenticity. As I understand it a lot of exhibit cards have been reprinted, and just from looking at them online, I'm having a hard time telling the difference. I read an old thread regarding this a while back that talked about the differences of the back color being a give away, but most of the cards that I see for sale/auction online don't have scans of the back. Are there any other ways to tell? Another question that I have is are there certain cards that we reprinted or have they all been? Are there any sets that are easy to put together, and on the other hand, are there any sets that are extremely difficult and why? How easy are they to find in EX or so condition compared to other vintage issues? Thanks and feel free to answer any questions that I forgot to ask.