Earlier this week, Mage, a marketplace app for Magic: The Gathering (colloquially known as Magic) cards, launched on Product Hunt. If you're not familiar with Magic (though it was released in 1993) — it's a strategy card game where players battle each other as wizards, or “planeswalkers.” Today, it's the largest trading card game in the world with 35 million (!) players.

How it works: The Mage app uses computer vision and machine learning to scan, recognize and price every single Magic card.

Some initial feedback from the Product Hunt community:

“I wouldn't have my collection categorized if it wasn't for this app.” - Javier

“Useful app for staying up to date with Magic News, deckbrewing in the couch and fast and easy card buying” - Michael

We've started to see more and more of these products — niche digital marketplaces — crop up as alternatives to eBay. There's Bump for limited-release streetwear from brands like Supreme and Kidizen for used children's clothes. One of the earliest examples of this is GOAT, a secondary online marketplace for buying and reselling sneakers, which launched back in 2015. Earlier this year, Foot Locker invested $100M in the company.

It's not hard to imagine Mage having similar success. The average Mage customer spends about $120/month on Magic cards, and Mage takes a 10 percent cut of each purchase.

They're also set up to tap into an even broader market of collectables. Next up? According to Mage's founders, they're interested in expanding with Pokémon, Yu-Gi-Oh and Dragon Ball Z, along with baseball cards, stamps, coins and wine.

The deadline for Makers Festival submissions is 11PM PST today. Get your submissions in! 💪