What can be said about this character, apart from Darth Vader, this has got to be one of greatest movie badies ever. The helmet and jet pack are made into one piece and the black head finishes of the look.
BOBA FETT I CODE sw002 SET/S: 3341, 7144, 4476
Apart from being a lighter blue in colour, (more like the screen character), there are no differences to this compared to the other greyer version. The only thing I can see that may only be down to variances in the print process.
BOBA FETT II CODE: sw002a SET/S: 6209, 6210
This is the really rare one with printed legs and arms. This also fetches quite a price and quite sort after, prices paid can be in the region of £40 - £60, ($60 - $100 US), but for me worth it, probably the best official minifig Lego's produced to date.
Have noticed customs similar to the original on eBay recently - a little too good, so beware, better off looking in "Bricklink", link top left of the main page, but rarely come up and very pricey.
BOBA FETT III CODE: sw107 SET/S: 10123
This is such a cool figure, apart the shaped head with added colour tones and eyes, what really makes this so good is the extra detail on the arms and this has only happened in a few figs before.
By the way, the custom blaster came with the figure when I bought it, an added bonus and just added to the overall coolness.
GREEDO CODE: sw110 SET/S: 4501
Another fleshed out character. The only unique thing about this character is the torso, I believe the head piece is used with some Ninja set.
DENGAR CODE: sw149 SET/S: 6209