This set contains the most rare Boba Fett minifig. It was unique because it had detailed printing on his arms, belt, and legs.

Approximate value of the Cloud City Boba Fett minifigure: $400.

From the manufacturer:

Han Solo and Princess Leia have journeyed to Cloud City, only to discover it is an Imperial trap. Now Luke Skywalker must challenge Darth Vader to try and save his friends. This exciting set is based on one of the most famous locations from the original Star Wars trilogy. Recreate your favorite moments from Star Wars Episode V: The Empire Strikes Back, or create your own adventures. Includes Luke Skywalker, Darth Vader, Stormtrooper, Princess Leia, Han Solo, Boba Fett and an all-new Lando Calrissian mini-figure. The set is more than 25" in length and features four separate play areas. You can even blast Luke through the window and drop Hans into the carbonite. Includes 698 pieces.

More about the Boba Fett minifigure in this set on Brickset.com.