eBay

Even with all the newer collector apps available, eBay remains one of the most important apps in the card hobby. It’s still one of the best places to buy singles, watch auctions, sell your own cards, and understand what people are actually paying for a card.

That last part matters a lot. Scanners and estimates can be helpful, but completed sales often tell you more about real market demand. If a card is listed for $500 but recent sold listings are closer to $300, you’ll want to know that before buying or pricing your own copy.

eBay also has trading-card tools that can help sellers list cards faster, including scan-to-list features for certain card categories. And you can even buy a card directly from PSA and send it to your own vault for free. This will help you resell it when the time is right without having to handle shipping yourself. Even if you use other apps for tracking and research, eBay is still one of the core apps every collector should have.