Are basketball cards worth anything depends almost entirely on which decade the box came from and whether the cards inside it are base cards or inserts. The sport's modern market is built on parallels and serial numbers, and its older value sits with 1980s rookies. Everything in between is usually common.
Base cards from the 1990s are common
Production in that decade reached levels that have kept base cards cheap ever since, and because the buyers were collectors rather than children, a high proportion survived in good condition. That combination puts the price on the floor. If your box is mostly base cards from those years, the honest expectation is close to nothing for the bulk of it.
Inserts and numbered cards are not
The same decade introduced insert sets seeded at low rates, and the modern era added serial numbering that states the run on the card. Both are genuinely scarce. Pull anything that is not a base card, anything with a number out of a number, and anything with an autograph applied during manufacture, and check those individually.
1980s rookies
Before the production boom, basketball print runs were small and the cards were handled rather than stored, so sharp examples of well-known rookies from that decade are scarce in a way nothing later is. Condition swings those prices hard, so sort them by how clean they are before you start reading sales.
Then price what survives the sort
Five completed sales of the exact card, in your condition, into the card value checker. Keep the comparables recent: basketball prices move with performance faster than any other sport here, and a sale from last season may have been made in a different market.
Questions people ask about are basketball cards worth anything
Is a card of a famous player automatically worth something?
No. Fame raises demand and does nothing about supply, and for the most famous players of the overproduced era the supply of their common cards is enormous.
How do I tell an insert from a base card?
Inserts carry their own set name on the card, use a different numbering scheme, and usually a different finish. A published checklist for that year confirms it.
Are cards from the last few years worth anything?
The base cards, rarely. The short-printed parallels and the numbered versions can be, and the card tells you which it is.
What if nobody is selling my card?
Then it has no readable price. That is common for cards with narrow appeal and it means patience rather than value.