One model, Melanie's Mall, is currently going for $150! That's nothin' to sniff at!

Found your old Bop It? You can slap an ad online for yours and get upwards of $90 for that thing! 

If you had a completionist collector's attitude growing up, then you can make a pretty penny. This set is going for $425! 

If you found this toy boring and never bothered opening it, then you could make $399 for it! Unfortunately, they lose value pretty quickly if they're not in

mint condition. 

While you make a lot more off of unopened dolls, you can still make a nice amount of money off of an eclectic collection. This set is available

for $125.

Don't lie, you had at least one. Chances are it's not still in it's box, but you can still make some cash despite that. A hefty collection of dolls

target="_blank">goes for $175 online. 

Is your Gameboy still hanging around? You could make $139 for it if you play your cards right! 

Were you a fan of board games and Disney Princesses growing up? If so, you might have this game lying around. You can even make $80 off of

it! 

You have SERIOUSLY hit the jackpot if you have any unopened Lego sets sitting around. This one is going for $1,374! Don't worry, if you just have a bucket

of bricks, you can get cash for that too.