I'll be honest, these figures sell relatively cheaply now I'm finding... I just bought some at a small local toy show in the mall that comes around every couple of months, and got them for $4 and $3 each loose... If that's not an issue (packaging) it's much better than the boxed set deal IMO.
The screwjob (which thanks to Adam for posting it) on the extra heads and weapons is really quite lame. The Fett was one of the only reasons to buy him twice or thrice in some cases, same with Vader which didn't even appeal to me that much but displaying him with 2 heads prompted me to buy 2 of them.
I wasn't going to buy this boxed set because I have a complete carded set to display, and I like all the artwork on the packages and stuff, but really the lack of the extra parts would make me pass on the boxed set anyway I think. Disappointing to say the least.