Marquez Holdings

Collection vaults that run in your browser.

Marquez Holdings builds and operates collector software that opens from a link. There is nothing to install and nothing to sign up for before you can use it. The catalogue, your collection, the prices and all of the arithmetic stay on the machine in front of you — and where the data runs out, the software says so instead of filling the gap with a confident-looking number.

Ventures

Two vaults, in market.

Both do the same job for a different collection: tell you what you own, what it cost, what it is worth now, and how much of that answer is actually known. They share an approach, not a codebase.

Open in browser

Arcanum

Trading Card Collection Vault

A complete vault for four trading card games — Magic: The Gathering, the Pokémon Trading Card Game, Yu-Gi-Oh! and Disney Lorcana — with a quantitative price engine that runs in the page rather than on a server. Four catalogues, four collections, four portfolios, and an analytics layer that understands the difference between them.

Four catalogues covering three decades of printings: 1,049 Magic sets back to 1993, 218 Pokémon sets back to 1999, Yu-Gi-Oh! from 2002 and Lorcana from 2023
A game switch that swaps the catalogue, collection, portfolio and every price series at once — it is not a filter over one merged pool of cards
Everything scoped by game down to the database row, so a Pokémon card can never be valued against a Magic price list
Finishes and condition grades that each game actually uses, from etched foil and reverse holo to first edition and cold foil
Price history where it exists — Magic from 2012 onward — and its own daily snapshots where no provider publishes history at all
Portfolio views grouped the way each game thinks: mana colour identity, energy type, monster attribute, ink

Open Arcanum About the venture

Open in browser

PopVault

Funko Pop Collection Vault

A collection vault for Funko Pop figures, built around the fact that a Pop is not worth one number. It ships a catalogue of 20,497 figures across 110 lines inside the app, appraises every piece against the condition you actually keep it in, and carries the full arithmetic from cost basis through to a forecast with an uncertainty band.

20,497 figures from every Funko line — 110 of them, from Pop! Heroes to Pop! WWE Covers — each with its box number, variant tags and artwork
Three prices per figure — out of box, in box and sealed — held separately and never averaged into one figure
Cost basis with quantity-weighted blending across purchases, realised and unrealised profit, and return on cost including sale fees
Concentration by line, state, variant and value band, a Herfindahl index, CAGR, maximum drawdown and annualised volatility
A drift-and-volatility forecast of the portfolio, published with an uncertainty band rather than as one confident line
An unpriced figure is counted as unpriced — excluded from the total and reported separately, never added as a zero

Open PopVault About the venture

How we build

Three commitments, held to in the product.

These are not values on a wall. Each one is a rule the software is written to keep, and each is visible in both ventures.

Nothing to install

Both vaults open from a link and run in the browser. Your catalogue, your holdings and every computation stay on your machine, and an account is a convenience for moving between devices rather than a precondition for the app to work.

Never blend what should not be blended

A Magic holding is not a Pokémon holding. A sealed figure is not a loose one. A grade does not carry across publishers. Where two things differ they are kept apart in the data model, not averaged together in a number.

Say what is not known

Missing data is reported as missing. Every headline figure carries the coverage it was computed over, so a total built from part of a collection is never presented as the whole of it.