Like many of the Japanese Micron sets, these figures were released individually as store exclusives. Megalo Gritbit and Megalo Zapmap were made available on September 29, 2005 with the purchase of any new Transformers product. Megalo Gritbit was exclusive to Hello Mac stores while Megalo Zapmap and Megalo Zigzag were exclusive to Joshin Denki stores. Tokyo didn't have any Joshin Denki stores so you'll probably find that two of the 3 figures are harder to find and will command more on the secondary market.
Megalo Gritbit is my favorite of the three. At one time I owned every single version of this mold, a task that took me some time and money to complete. I kinda wished I still owed a few of this mold.
Megalo Zapmap sorely needs some additional paint apps on his robot form. I'm not sure why red wasn't at least used to highlight his visor. Something other than the blue is needed to help break up all that white.
Megalo Zigzag is one of those molds that just takes some getting used to. I used to loathe this mold, but I guess when I started to accumulate the different variations of it the mold started to grow on me. He certainly is colorful in robot mode, more than I can say for Megalo Zapmap.
I haven't kept up w/ the secondary market prices of these exclusive Microns, but I know I had to shell out a decent amount when I picked them up new. My guess is that have gotten crazy expensive...if you can find them. Great molds, even better colors, the Megalo Micron Team really is a sight to behold.