They own Izzi’s Gym, one of Sioux Falls’ most exciting trading-card destinations. They built Cardboard Capital to give collectors the kind of clear, useful market research they wanted for themselves.
HOME BASESIOUX FALLS
BUSINESSIZZI’S GYM
OPENED2025
FOCUSCARDS + COMMUNITY
01
THE FOUNDERS
BROTHERS WHO BUILD THINGS THAT MATTER.
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CO-FOUNDER · ENTREPRENEUR · GROWTH THINKER
CHRISTOPHER HAMZE
Christopher is the big-picture builder. He brings years of entrepreneurial experience, a sharp eye for growth, and a stubborn belief that ambitious businesses can still put people first. He pushes Cardboard Capital to ask better questions, explain the answer clearly, and build something collectors can trust.
NH
CO-FOUNDER · COLLECTOR · COMMUNITY BUILDER
NICHOLAS “NICK” HAMZE
Nick is the heart of the mission. His bond with Izzi inspired the store’s name and its belief that a local business can help people feel less alone. He brings the collector’s perspective: the excitement of the hobby, the importance of the details, and the responsibility to welcome newcomers without judgment.
WHY IZZI’S GYM EXISTS
LOVE, LOSS, AND A PLACE TO BELONG.
Izzi’s Gym began as a tribute to Izzi, the beloved Cavalier King Charles Spaniel who changed Nick’s life, and to the brothers’ father. The Hamze family turned grief into a place built around joy, connection, and community.
That purpose still shapes the business. Cards bring people through the door, but the real goal is to create the kind of place where collectors, players, parents, and curious newcomers all feel like they have a seat at the table.
THEY ARE IN THE MARKET—NOT WATCHING FROM THE SIDELINES.
01
REAL STORE EXPERIENCE
They see what collectors ask for, what actually sells, and where price data can mislead people.
02
COMMUNITY FIRST
Izzi’s Gym was built to be more than a shop—a welcoming place where people can learn, play, collect, and belong.
03
BIG IDEAS, CLEAR WORDS
They believe serious market research should be understandable without a finance degree or a spreadsheet obsession.
04
HONEST ABOUT RISK
They would rather show that evidence is missing than dress up a weak signal and call it an opportunity.
WHY CARDBOARD CAPITAL EXISTS
COLLECT WITH EXCITEMENT. RESEARCH WITH DISCIPLINE.
Owning Izzi’s Gym gives Christopher and Nick a front-row view of the card market. They see the excitement, the confusing prices, the thin sales histories, and the questions people ask before spending real money. Cardboard Capital turns those questions into tools anyone can understand.
They will never promise that a card must rise in value. Their promise is better: show the evidence, explain its limits, and help every collector make a more informed decision.