Has Anyone Resubmitted In A Hope For A Better Grade?

Yep, some people exist on nothing but crack outs in the coin business, it takes a great eye, and a good handle on the current market values, but it can be done successfully. It can really mess with the pop reports though. I remember my good friend (ex-owner of ICG) told a story of a particularly rare gold coin that had a pop of 14 and 7 of those he knew for sure were re-submissions from a crack out. There were less than the total population of TPG coins even made. He said he and the other graders (then he was at PCGS) could tell from a tiny mark on the coin that kept it from the higher grade but it was so close. Every dealer that bought it seemed to think the same upgrade potential. I recall the upgrade price was about $14,000 more, so definitely worth it if it ever crossed.

Crack out artists will look for coins with a good spread in value between grades and then look for coins at the top end of the grade in a TPG holder, they also love finding new/old collections to come on the market full of old holdered coins from the beginning of the TPG companies creation, as the TPG's tended to be a bit more conservative back in their beginnings.