Colorforms
Colorforms were originally composed of simple geometric shapes and bright primary colors on black or white backgrounds, but the line eventually grew to include full-color illustrated play sets with various themes. Colorforms are on the rise in the resale markets—1980s-themed sets like Masters of the Universe, Gremlins, and Michael Jackson retail for $250 to $300.
She-Ra and Swift Wind
She-Ra: Princess of Power was He-Man's twin sister within the Masters of the Universe franchise. She-Ra's horse, Swift Wind, was the equivalent of her brother's Battle Cat Cringer. The original action figure still in-box with Swift Wind sells for $4,000, but the individual figurines are worth $150 to $600, depending on condition and rarity.