>>8132122M.U.S.C.L.E. figures. They were a slightly different version of Kinnikuman "kinkeshi" figures from Japan for the US market. The three differences were that they were plastic instead of keshi rubber like the original Japanese release, slightly larger (I assume because the molds were reworked slightly since molding plastic is a bit different from rubber) and that not all 418 kinkeshi made it into the M.U.S.C.L.E. line (I think it was just under 200 actually made it).
I'd take the time to research which ones you have so you don't lose out on money. I think I see Warsman, and Black Hole and Buffalo Man.
>>8132129>not realizing the fanbase of Kinnikuman across generations and on both sides of the Pacific