Claiming the top spot is the San Diego Comic-Con 2013 Spider-Man. Just 350 of these three-piece LEGO sets containing a Spider-Man minifigure were given away at the 2013 San Diego Comic-Con to promote the Marvel movie The Amazing Spider-Man 2.

The current value for a new and sealed set is estimated at an astonishing $16,832 today, with an average yearly gain of about 19%. A savvy investment, the value of this rare set is expected to reach an eye-watering $22,900 over the next five years.

Used sets are also a worthy investment, currently valued at a hefty $14k.

Now discover the surprisingly valuable old stuff you might have at home

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The Most Sought-After LEGO sets and what they sell for