Another day, another super expensive purchase for Floyd Mayweather ... this time the boxer dropped $250k on two diamond and gold chains -- and offered to pay IN CASH!!!
The boxing legend hit up Mr. Flawless in NYC -- where he had his eye on two diamond cuban link chains.
When it came time to pay, Floyd whipped out a giant stack of cash ... but we're told he was just playin' around -- and did what everyone else does at a jewelry store .