He just sold the last 12 he had at the show for $20 apiece to us on the last day since he was packing up and heading out. He was getting $120 apiece for them the first three days. We hit it off with him so he gave us a deal and explained his system.
There have been many sure things the past 3 years based on his criteria. Most of them were Marvel (e.g. Thanos 13, TAH 22, Venom 3, Immortal Hulk 1), but DC is now getting into the game (although Naomi 1 was an awesome play as well). The latest one was Punchline - she was telegraphed well in advance - and there several others coming up from both companies that should be $$$$$.
The Independent game has been much tougher since really late 2011 - mid 2013. Back then pretty much every Image #1 became a $10-$20 (or more) book overnight and that lasted for a few months. For every hit now there are a ton of misses, and the window for selling them is much shorter.