A few figures have stirred up some controversy amongst MUSCLEheads. These figures are not shown on the poster nor on any other official MUSCLE item, yet they have the same MUSCLE-like plastic and feature the Y/S*N*T trademark. They are periodically found in MUSCLE lots from both the US and Japan. Are they truly MUSCLEs?
28-packs cost $6.99 in the 80s (according to scans of the 1986 Sears Wishbook at Action Figure Archive ; I also saw a 28-pack with a Bradlee's price tag with the same price). Four 28-packs were offered: Thug Busters, Cosmic Crunchers, Mighty Maulers, and Cosmic Showdown.
Thanks to Doctor Dew for compositing and restoring the poster image above! The M.U.S.C.L.E. poster was a mail-away offer from Mattel. One could be ordered by sending two four pack proof of purchases or one 28-pack proof of purchase. At first, the poster featured all-pink figures. As the line expanded into non-pink colors, the poster was updated with the new colors. Shown here is the all-pink poster.