Actually, there were 4 unreleased sculpts - The Iyanna model was the test piece for Juan Diaz' recruitment - 12 of each unreleased sculpt were made, mine are all originals. There is one or two very rare items i'm chasing down (only 4 copies were made), sadly, I know one of the people who own one of them... however I don't think I can tempt him to part with it.
There have been recasts around of the 4 unreleased, however the top right in the photo on the blog wasn't to my knowledge recast by anyone and is also the rarest of the four.
I've not included any of my RT era models, simply because they aren't part of any units FOC wise. That and I have no idea how to account for them points wise lol. Perhaps i'll get them sorted out as well and include them in a separate photo sometime down the track. Not sure if I want to keep them as bare metal collectors items or paint them up though, as putting money into having them painted, doesn't always equate to increasing their value in the rare miniatures market.
I've been lucky enough to know some of the guys who broker the rare miniatures out of Citadel, including those who worked on the last Eldar codex (4th Edition), who've given me great information on where to find them.
There is one collection I do know of that is over 80k in the US, however not entirely sure its all painted or not. Good (expensive) times!