Too bad I never checked ebay prices because about two years ago my local Sam Goody had about 10 copies priced at $15 a piece.
Yeah, I bought mine for $15 used at about that time and ours had a lot of the Greatest Hits version (new of course) that my brother picked up. I was surprised when the eBay prices shot through the roof in less than a year even for the GH version. Here's a list of my knowledge of the variants...
2 different ESRB labels (black spine)
the misprint listed above
Greatest Hits version
a GH misprint with Sephiroth in flames on both inserts
...so 5 variants by my count
There might have been a Sqaure-Enix variant on the GH version, too. I'm not quite sure.