Sneak peek: Meet Bill Leff

Sneak peek: Meet Lisa Ridey

You have to go all the way to Australia to find a Snoopy collection this big! Lisa Ridey has 15,384 items related to the beloved Peanuts pooch and his pals!

Sneak peek: Meet Morgan Hambrick

Jim Hambrick’s Superman collection began with a lunchbox he received at five years old. Sixty years later, he has the world’s largest collection devoted to the Man of Steel — and a family-run museum in Metropolis, Illinois, to showcase it!

Sneak peek: Malenna Bravo

Photographer Mel Bravo didn’t start her Barbie collection until she was an adult — but she’s more than made up for lost time, amassing a collection of more than 3,000 versions of the world’s most famous fashion doll, plus accessories, spinoffs and more. And the collection is still growing — Mel estimates she spends $20,000 a year in new acquisitions.

Sneak peek: Meet Al Sorenson

Al’s passion as a collector is celebrity-autographed memorabilia, including a sketch he produced of Michael Jordan, which "MJ" autographed.

Sneak peek: Meet Errick Spencer

His passion and knowledge of sneakers — mostly Air Jordans — has led Errick "Unbreakable Kicks" Spencer to assemble an enormous and amazing collection of shoes, which he displays and then reviews on his YouTube channel for his many followers. The Kobe/Jordan pack and Drake collaboration are just a couple of the gems found in his valuable sneaker vault.