The Masterpiece line is a series of Transformers created by Takara to update a character's G1 toy with today's advanced engineering techniques. "Masterpiece" Transformers tend to be very expensive, with an average price of 10000 yen (roughly $80 at current conversion rates). Currently, the Masterpieces appear to be on a bi-yearly rotation, with a new being released in the spring or the fall.
MP-1 - Convoy
This is a representation of G1 Optimus Prime in die-cast.
20th Anniversary Optimus Prime
Hasbro released this to commemorate the 20th anniversary of the Transformers franchise, it comes with shortenned smokestacks and replaces some of the die-cast part with plastic.
20th Anniversary DVD Optimus Prime
Version that includes a DVD
MP-1 - Convoy Lucky Draw
Gold re-coloring of MP-1.
MP-1l - Convoy Last Production
Last chance for MP-1 at retail.
MP-1B - Black Convoy
Black-recoloring of MP-1, representation of G1 Nemesis Prime.
MP-2 - Ultra Magnus
White re-coloring of MP-1, representation of G1 Ultra Magnus.
MP-3 - Starscream
This toy is designed by mechanical designer Shoji Kawamori who had designed some of the original Diaclone toys, including F-15 Robo which would become Starscream and the rest of the seekers, he also famously designed the VF-1 Valkyries which Habsro recolored as Jetfire. It was designed to resemble a real-life jet hence the dark grey color scheme, there is a lot of kibble used to cover up the robot parts to form a streamlined fuselage such as the parts of the rear fuselage that hang off the hips like sheaths.
He comes with a non-transforming Megatron gun, as used several times in the show, and a stand that can support him in aircraft mode and robot mode (as he is very prone to falling over)
For the American release, Hasbro had recolored MP-3 based on his G1 toy design (with blue nosecone as opposed to grey like in the show), no changes were made to the engineering, however.
MP-3G - Ghost Starscream
Cast in clear plastic to depict his "ghostly" visage.
MP-4 - Convoy Perfect Edition
A rerelease of MP-1 that comes with his iconic trailer as well as Roller
MP-4S - Convoy "Sleep Mode"
Recolorization of MP-4 to resemble the deathbed scene from The Transformers: The Movie, the trailer is made from transparent plastic give a ghostly effect. There are weathering effects on this version with tints to his red and blue color-scheme as opposed to totally grey/black colors like Black Convoy to place emphasis that this is a dying version.
MP-5 - Megatron
Representation of G1 Megatron.
MP-6 - Skywarp
Recolorization of MP-3, representation of G1 Skywarp.
MP-7 - Thundercracker
Recolorization of MP-3, representation of G1 Thundercracker.
MP-8 - Grimlock
Additionally, Takara released their own version of Hasbro's G1 colored Masterpiece Starscream with reduced weathering details.
The Hasbro release of MP-08 came with a crown, gun and sword.
MP-08X - King Grimlock
Release with the accessories provided in the Hasbro version.
MP-09 - Rodimus Convoy
MP-09B - Black Rodimus Convoy
Darker color scheme.
Masterpiece Rodimus Prime
Hasbro release of MP-09.
MP-10 - Convoy
An entirely new mold, comes with scaled Roller and a trailer too.
MP-10B - Optimus Prime Black Version
Black Convoy aka Nemesis Prime.
MP-10 Convoy Mode "EVA"
A recoloring of MP-10 in Eva Unit-01's green and purple color scheme as part of the Evangelion×Transformers crossover series. His trailer has been painted white with NERV livery around (with a Roller figure with a yellow NERV logo), he can store a red-colored matrix inside his chest and has a red NERV logo on his right shoulder.
Masterpiece Optimus Prime
Hasbro release of MP-10.
MP-11 - Starscream Coronation Version
This is a retool of MP-3 Starscream. This robot mode looks more like Starscream in the show, instead of looking like a real F-15 Eagle like MP-3 does. The aircraft mode is no longer streamlined due to the removal of a lot of the kibble, the tail fins are now part of the legs. The feet are completely remolded and viewable Jet engines also serve as heels for Starscream in robot mode, providing better balance. Starscream no longer has detachable missiles; instead, his weapons are attached to his arm (just like in the show), using ball joints, they can attach to the wings in aircraft mode, this allows you to transform Starscream without taking anything apart, not even the weapons.
MP-11 comes with new accessories such as a crown and a foldable cape, as seen in The Transformers: The Movie, although he lacks to stand that allows you to display him in aircaft mode.
MP-11s - Sunstorm
Redeco to look like yellow seeker Sunstorm.
MP-12 - Lambor
MP-12 is a representation of Sideswipe, he can transform into an accurately detailed Lamborghini Countach, the toy is official licensed by Lamborghini too.
MP-12t - Tigertrack
Redeco to look like Tigertrack.
MP-13 - Soundwave
MP-14 - Red Alert
Retool of MP-12.
MP-15 - Rumble & Jaguar
MP-16 - Frenzy & Buzzsaw
MP-17 - Prowl
MP-18 - Bluestreak
MP-19 - Smokescreen
MP-20 - Wheeljack
Masterpiece Soundwave (with all of the data disks)
Masterpiece Acid Storm (Hasbro exclusive)