Darth Vader's Sith Starfighter - Star Wars Transformer by Hasbro.
This ship is a modified version of the Jedi Starfighters seen in Episode III Revenge of the Sith, from a book called Dark Lord: The Rise of Darth Vader.
I really like this ship, it's got a nice black and gray paint scheme, and came out long before Hasbro went shadow-happy and flooded the market with black painted vehicles and characters. I also really like the design of the ship, it has elements that harken back (or forward) to the TIE Fighters of the Original Trilogy movies, and a few ideas left over from the Jedi Starfighters of Episode II.
Also, it transforms into a giant mecha-Vader. Yes, I used to buy the Star Wars Transformers. But I get them for the vehicle mode, as they're a nice scale, around 5-6 inches long, and are reasonable representations of them, and the only ones in this scale. I don't buy them currently, due to lack of funds, but there are several that I will be hunting down once I can afford to get to them.
Remember Kids: It is useless to resist, don't make me destroy you...