As far as GBs I won't be building, I have enough "spare" prints to open up the Colosseum to level 39, Hagia Sophia to level 47, and Notre Dame to level 26, plus for St. Mark's Basilica, which I will probably build someday, I could already open up to level 41. Those are just the ones I have a large number of extra prints for. But this one takes top prize of prints I'll never need:
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And yet, I think trading prints is a horrible idea. For me, they'll just sit there collecting dust, and that's how I think it should be. It's just how it is in this game... you either use 'em or ignore 'em. Of course I can't even come close to players that have been playing for months and years longer than me. Ask
@LacLongQuan how many extra prints are too many extra prints.