I remember how popular the Clone Wars Slave 1
set was around here. I only saw one...that was it. Not being that heavily into the Clone Wars animated product at the time I passed on it (the $100+ price tag sure didn't help) but it was very cool looking. Bossk the bounty hunter in animated form looked incredible...I wish Hasbro had repacked him separately on an individual cardback so more people would have had a shot at owning him.
I think the astro droid was also unique to that set and had never been done before...unless it was "Goldie" or R4-P17 or one of the astros that had already been made individually, but I don't think it was.