Spice Girls Doll Collection
Average original price: $15
Potential earnings: $225
These five girls used to be one of the most popular bands in the world, and these dolls brought even more success to the group. You could buy Posh, Baby, Ginger, Scary, and Sporty for only $15. Now, they are worth much, much more than that. In fact, some of the dolls could sell for as much as $225! Of course, someone who has an entire set of them in good condition can make even more money.