Dana White Flexes Huge Wad of Cash, Buys Pure Gold Trading Card

Dana White 's all about a fair price ... handing out hundos to a fan who tried to give him rare memorabalia for free -- and, flexing a wad of cash while doing it.

The CEO and president of UFC was at Fanatics Fest -- a multi-day festival featuring some of the top athletes and sports personalities in the world -- when a fan came up to take a quick pic with him.

Turns out the fan -- a guy named Kenny Duncan Jr. -- is the founder of Celebrity Mint , a company that makes commermorative coins, shaped like trading cards, of legendary sports figures ... and, he offered a pure gold coin featuring Mike Tyson for free.

Dana could've take the card and run -- but, he refused to accept without giving him a little something ... ulatimately whipping out a fat stack of cash and peeling off $600 in exchange for the .5 gram coin.

Dana -- who's tight with "Iron Mike" -- puts the money in Kenny's hand and heads off ... a welcome surpise for Kenny who was ready to give the card away.

Celebrity Mint's got other stars beside Tyson BTW ... featuring stars like Floyd Mayweather , Ric Flair and Pete Rose -- athletes certainly worth of being cast in gold.

DANA WHITE HARD AT WORK

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Dana's one of the hardest working guys in sports ... and, clearly, he ain't trying to take advantage of anyone!