I've seen them 7 times:
1988 - 7th Tour (Troy, NY, USA)
1991 - No Prayer (Rochester, NY, USA)
2000 - Brave New World (Mountain View, CA, USA)
2003 - Gimme Ed (NY, NY, USA)
2006 - AMOLAD (Long Island, NY, USA)
2008 - Somewhere Back (NY, NY, USA)
2010 - Final Frontier (NY, NY, USA)
...and...