Cosmos warned Optimus about a fuel plant the Decepticons were building, so Optimus took the Dinobots in his trailer and, under the guise of having a delivery for Shockwave, invaded the construction site and defeated the Decepticons. After this victory, Optimus turned his gaze skywards, and thanked Cosmos for his contribution to the Autobot cause. The Autobot Spy in the Sky
"Hero Mashers" Optimus Prime, Bumblebee and Grimlock took on Megatron in the middle of a busy city. Optimus came to Bumblebee's help while riding atop of Grimlock, swapping heads with his mount to bite Megatron's arm off, getting a hold of the Decepticon's jetpack at the same time. He attached both pieces to himself, and flew around for a bit before returning to the battle. He thoroughly scrambled his pieces with those of his teammates, then took down Megatron with his "dino-fist." Afterwards, the Autobots returned to their normal configurations (though it took them more than one try to do so!) Hero Mashers commercial

Outstanding work here. After reading a number of complaints about how the price has ‘increased’ over the years, it’s great to see this analytical approach. One additional hypothesis I have is related to the increase in the number of sets released each year, which would appear to be supported by your data. More sets to buy to be ‘complete’ makes for more money out of pocket.
A K-Mart exclusive set released on "Black Friday" (the day after Thanksgiving, the most hellishly busy shopping day of the year), this set consists of Super Base Optimus Prime, Jetfire, their respective partner Mini-Cons Sparkplug and Comettor, the Adventure Mini-Con Team, and oddly enough, Longarm. Optimus Prime's red plastics and paint were replaced with gold, the only changes made to anyone in the set. It is this set from which the name of Optimus Prime's combined mode with Jetfire, Jet Prime, comes.
As with all Action Master toys, Optimus Prime himself could not transform. His sculpt is based heavily upon the The Transformers cartoon model, though the colour scheme may be based upon his Powermaster (pre-supermode cab robot only) body, with blue forearms as opposed to just blue fists, although unlike the Powermaster cab robot it has blue thighs as well. His truck cab vehicle and the trailer do transform, though neither have robot modes. The truck cab can transform into a small plane, while the trailer transforms into a battle station with turrets that several Action Masters can man.
It may be that the price of an individual brick has gone down over time, but what does it matter if the size of the bricks has decreased overtime? Sure, the average number of pieces in a set has increased, but how many of those pieces are tiny details? To answer this question, I compiled all the weight data on brickset.com and compared the sets by their price per gram in a similar fashion to how I compared them by price of piece. Below is the chart of my results (prices are in US dollars).
Alternators Optimus Prime transforms into an accurate 1:24 scale Dodge Ram SRT-10. The vehicle mode features rubber tires, functional steering, opening hood, tail gate and doors with a detailed cabin interior. Several of the details of his robot mode body are based on the sculpt of the 20th Anniversary Optimus Prime figure, but the head itself shares more similarities with the Powermaster mold. He is armed with a small pistol which transforms into his vehicle mode engine.
What makes LEGO sets seem more expensive now is that the effective piece count seems lower. I remember that in the 80s, each set was full of bricks that were not overtly specialized only to that set. So they were useful for more things. Now the sets usually come with less bricks and plates (things that could be useful everywhere) and bring more things like minifigure accessories, flick fire missiles and other things that are not that useful. Although I think that everything was far worse in the late 1990s/Early 2000s than it is now.

An all-new Leader class figure of Optimus Prime, featuring a robot design and transformation that is closer to its film counterpart than the 2007 toy version. Features retractable blades on both forearms. New "MechAlive" feature consists of visible moving gears in the chest behind the cab windows. At the push of a button on the back of the cab, the truck mode emits an engine idling sound. The transformation sound is played when the upper torso and lower torso are connected. A recording of Peter Cullen saying, "I am Optimus Prime!" is played when his chest is pushed upward via a lever on his waist.[97]


Megatron came upon Optimus and challenged his old foe to a duel. Optimus managed to gain the upper hand, but hesitated to deliver the killing blow when he discovered that Megatron had married the Matrix to his spark, corrupting it. Several Decepticons then swarmed Optimus, allowing Megatron to blast a hole through his chest. Dead and defeated, Optimus plummeted down into the bowels of Cybertron. Pax Megatronus Rodimus and Duke travelled far beneath Cybertron, where they discovered Ultra Magnus- the Autobot god of death -carrying Optimus's body away. Earth: R.I.P.
Optimus Prime and his troops lay deactivated on the Fera Islands for three million years until G.I. Joe stumbled upon them one day in 1939. The Line The Autobots were reactivated by a repair drone and given new disguises, with Optimus Prime being reformatted into an unknown World War II-era human vehicle. He explained to Duke who they were, and learned that Megatron's Decepticons had been reactivated a year prior, and were currently wreaking havoc on Europe along with Cobra. While hesitant at first, Optimus Prime soon joined G.I. Joe in their mission to destroy Cobra and the Decepticons. Transformed After commanding the Aerialbots to get the Seekers out of the way, Prime advanced across the Fera Islands, but met resistance in the form of Rumble. Trial by Fire
Ultra Magnus's legendary status was exceeded only by the legendary status of Optimus Prime. Combiner Wars Ultra Magnus toy bio Upgraded with the power of combination, Optimus could combine with any bots to form Ultra Prime. Combiner Wars Optimus Prime toy bio With mastery over the power of Combiners, the combined courage of Optimus and the Autobots would stop the Decepticon Combiners threatening cities and entire civilizations. Combiner Wars Battle Core Optimus Prime toy bio

As the Universe War began, Optimus Primal was shown a myriad of Transformers from across all timelines that he could choose to recruit into his Children of Primus in the battle against the Minions of Unicron. One such possibility was a Transformer who was either Thunder Clash or Optimus Prime, but, regardless, Primal chose Depth Charge and Rhinox instead. Homecoming
In late 1993, Hasbro relaunched the Transformers franchise with the Generation 2 line, with production again largely being done by Takara. The subgroups concept was done away with for the first year, but there were no new molds or characters. Generation 2 re-used the molds for many of the characters from the 1984 and 1985 line, but with mostly different color schemes and finishes, as well as different weapons and accessories. Megatron's figure was released later on. As noted previously, Megatron's original alternate mode, or "transformation identity", was a handgun with attachments, but in Generation Two, this was changed to a tank due to safety and security concerns. Most of the 1994 figures were re-releases or recolors of European G1 releases.
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