A nice article but I see a few flaws. First of all if the distribution of LEGO sizes/prices is increasingly skewed it is better to either split the sample or look at medians or rolling medians than averages. Secondly, this is a perfect case to run a regression panel regression with time dummies to see both the impact of time and the impact of size on the prices.

This sculpt was redecoed from the Generation 2 Gobot Firecracker. The plastic colors are a "solid" version of Firecracker's color layout, substituting opaque red for transparent red plastic. It was redecoed again for the third wave of Go-Bots to become Sideswipe (who Prime really looks a lot like), and would later be used to created Robots in Disguise R.E.V..
Part of the new Generations Cyber Battalion series, Optimus Prime is a new mold which stands 7 inches tall, and transforms from a truck (which is based on the Generations Thrilling 30 Legends Class Optimus Prime figure) into a robot in just 7 simple steps. The figure's transformation engineering had taken cues from the Reveal the Shield Legends Class Optimus Prime figure, while it still retains the same ol' articulation.
With the major threats taken care of, Optimus Prime turned his and the Autobots' attention to identifying and shutting down the rogue projects taking place across Earth using stolen Binaltech technology and secrets. It was during one of these missions that Optimus Prime faced off against Nemesis Prime, both in Binaltech Dodge Ram forms. Initially, things looked bad for Optimus Prime, as he was no match for his opponent's spectral armor. However, the Protector merged with Prime, and the enormous power that resulted allowed Prime to reflect Nemesis Prime's final attack, obliterating the evil Decepticon. Optimus Prime recalls the union of the two sparks being familiar, from an event in the distant past. Optimus Prime is reassured by the Protector about "the seeds of the future" and the Protector is revealed to be Optimus Primal.
Available exclusively from Japanese clothing company A Bathing Ape in 2017, MP Convoy Reissue BAPE Ver. is a trailer-less redeco of the MP-10 mold sporting a unique black color scheme matching the Convoy Reissue BAPE Ver. BLACK of the original G1 toy, with "BAPE's famous camouflage pattern" and an ape head print on the shoulder replacing the usual faction symbol.
When Vector Prime reminisced on some of the highlights of his multiversal career, he remembered many events involving Optimus Prime. Among these events was Optimus Prime using the Matrix of Leadership on the Hate Plague, Shockwave taunting a disembodied Optimus Prime, and Megatron firing on the head of Optimus Prime, creating a time storm that necessitated Vector Prime's intervention to ensure Optimus Prime's survival. Vector Prime: In the Beginning
If the Autobots went along with Prowl’s strategy, the resulting heat from the explosion caused the Autobots’ circuits to overheat, rendering them unconscious. Upon reawakening, the Autobots found themselves captives of Megatron, who informed them that their fellow Autobots would soon perish, and that the humans would be conquered by the Decepticons shortly after.

There is definitely a market for LEGO for adults. The modular buildings and other exclusives scratch that itch but there could be so much more. Currently the adult LEGO offerings falls into two categories: sets that look good but are boring to build (architecture) and sets that are fun to build (modular buildings, some Technic). The architecture line is marketed towards adult former fans of LEGO who want something to put on their desk. They can serve as a reintroduction to LEGO for adults.
A retool of Crash Combiner Optimus Prime available in a two-pack with Grimlock, featuring a new Optimus Prime-ish Combiner head and new arm parts with a green dinosaur-themed front shoulder pads, and he features a lighter shade of red plastic. Like the previous versions, Optimus Prime can become the top half of any Crash Combiner gestalt, though his official combination is with Grimlock as Primelock.
When they could not reanimate him, they used his body as a lure instead, bringing the Autobots to their lab, where they are infected. As this "Hate Plague" began to spread across the galaxy, Sky Lynx retrieved a Quintesson, who fully restored Optimus Prime to life. Coating himself in Morgan's heat-resistant alloy, Prime reclaimed the Matrix from Rodimus and unleashed its concentrated wisdom to destroy the Hate Plague.

QT-M Optimus Prime is a redeco of the GT-R Optimus Prime mold in the colors of the Transformers-sponsored Nissan GT-R used by the Team Mach racing team (a vehicle previously used as the base for non-toy character Mach Five Racing Prime). Like Transformers GT's Safety Prime, this toy was a collaboration with the Super GT racing series and was given away free to young children who attended TakaraTomy-sponsored "Kids Walk" events held by Super GT in the fall season of 2015.


In 1989, the entire line became limited to Pretenders and Micromasters. For the first time, the Transformers received a new design for their title logo. But many also regarded this as a time of a dearth in creativity and the lowest point in the toyline's history. The year 1990 saw the last American burst with the release of more Micromaster characters and the introduction of the Action Masters, non-transforming action figures who came with Transforming companions. Larger Action Master sets came with transforming vehicles and bases. The Action Master line was criticized for its perceived desperation for a gimmick, although it had a few defenders. The line predictably faded and would be the last Transformers output in the US until 1992.

Originally, the Alternators Dodge Ram mold was intended by Hasbro to be a completely different character altogether than Optimus Prime (which character is unknown), but Takara reportedly demanded the Ram be made into Optimus out of fear that the toy (whose vehicle mode is scarce in Japan as a real vehicle) wouldn't sell as well in their market if it wasn't a popular and easily recognized figure; as the figure reportedly cost twice as much to build as the others, Hasbro had to agree in order for Takara to continue fronting part of the production cost. In an ironic turn of events, the Dodge Ram was prematurely solicited by Takara not as "Convoy" (Optimus Prime), but as his Masterforce look-alike Ginrai. As a matter of fact, the head sculpt for the Alternators Oprimus Prime toy is based on the Super Ginrai (Powermaster Optimus Prime's "super mode") toy's head sculpt. Ultimately, however, Ginrai was cancelled, with only Hasbro releasing Optimus Prime as originally planned. Eventually, Takara released the Dodge Ram as as part of the new Kiss Players line, now named "Convoy" (Optimus Prime), and he will be released in Binaltech this year.


This Japanese-exclusive vacuum metalized golden redeco of Super Base Optimus Prime, whose name means "Shining Golden", was available as a prize in several draws, including a colouring contest held in the pages of TV Boy magazine, and in-store lottery draws at Tobu Department Stores. Between the draws, at least 58 "Kinpika" Prime toys are known to have been given away, making it one of the more widely available Lucky Draw figures, comparatively speaking. It came packaged in a plain white box, and including all the accessories and features of the standard release of the figure, including a gold-chromed Sparkplug (or "Prime", as he's confusingly known in Japan).
This gold vacuum metallized (save for his black joints, which they were made out of unpaintable plastic) Protoform Optimus Prime figure was featured as a Lucky Draw giveaway (along side similarly gold vac-metal versions of Voyager class Optimus Prime and Protoform Starscream) in the December 2007 issue of TV Magazine. Released in 2008, only 5 pieces were made, making it one of the rarest Lucky Draw figures; the images at right represent the only known photographs of it.
×