One of my favorite LEGO Star Wars figures is the LEGO Darth Vader. Everyone knows who Darth Vader is as he could be the most well known villain in movie history. The LEGO Darth Vader mini figures are very collectible and come in a few different styles.
There is a LEGO Darth Vader mini figure in the LEGO set Darth Vader's Transformation 7251. This is where Anakin Skywalker is essentially turned into Darth Vader. After Anakin's body takes heavy damage and he loses the bottom half of his legs, he is taken to another location and is made into a monster - Darth Vader. The LEGO Darth Vader in this set is known for not coming with a cape or lightsaber.
The LEGO Darth Vader in the TIE Fighter set is another awesome LEGO Star Wars figure and does come with a cape and lightsaber. The LEGO set is numbered 8017 and only comes with the Vader LEGO figure and the TIE Fighter itself. Vader fits nicely in the TIE Fighter and has a cool hiding place on bottom for the light saber.
An awesome set to own is the LEGO Final Duel 7200 set which is where everything kind of comes full circle. If you own this set then you will also want to own the Final Duel II 7201 which is the last piece. The two sets together combine to display one of the favorite movie scenes out there with Luke Skywalker taking on his nightmare and coming out on top. Darth Vader ends up actually helping out Luke to defeat the evil emperor.