A one-of-a-kind basketball card with an NBA logo patch from Michael Jordan and LeBron James' jerseys just sold for $900,000!!

Yes ... that's no typo. This is legitimately the most expensive basketball card, EVER.

TMZ Sports has learned Ken Goldin from Goldin Auctions sold the card at a private sale this week ... and he tells us it was a historic purchase.

The 2003-2004 Upper Deck "Exquisite Collection" card is awesome ... and features actual NBA patches from game-worn Bron and Jordan jerseys.

Only one of these exists in the world.

The $900K sales price blows the previous record out of the water ... a 1969-1970 Topps Lew Alcindor card that went for just over $500K in 2016.

We're told this card is the most expensive piece of LeBron and Jordan merchandise that has ever been sold.

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