#1 Kamala (Moon Belly) Hasbro series 7 (Value: $3,000 - $10,000)
A Kamala figure was released in 1993, as part of Hasbro's 7th series of figures. Interestingly, when the Kamala figure was released to the public, the figure featured a yellow star painted on his stomach, instead of his usual yellow moon.
Only 24 or so of the yellow moon Kamala figures exist and are now worth an absolute fortune. One collector sold a figure in 2013, for $6,500, with other sellers saying they've seen the figure range from $3,000 to a whopping $10,000.
Nobody knows why this version had so little made, with plenty of speculation. Some have claimed the yellow moon version was just a prototype, whilst others have claimed that it was deliberately made in short supply to be valuable. Whatever the reason, if you have this, you're sitting on a goldmine.
And yes, the real Kamala does have one.