Super Bowl LVIII Game-Used Overtime Flip Coin Hits Auction Block

The coin that helped determine the fate of Super Bowl LVIII can now be all yours ... 'cause the NFL has just put the one-of-a-kind piece up for auction!!

There are currently 19 bids for the relic ... with the highest being for $10,000 -- but given how historic the item is, it's expected it will go for far more when the gavel finally comes down in March.

It, of course, was used by Fred Warner and Patrick Mahomes to figure out which team would start overtime with the ball during the 49ers game against the Chiefs at Allegiant Stadium back on Feb. 11.

San Francisco ultimately won the toss with a tails call ... and went on to kick a field goal on the ensuing possession. When the Chiefs got the ball back, they subsequently scored a touchdown -- locking up their third title in the last five years.

The extra period marked the first time the NFL's new postseason overtime rules were put into play ... and also given how controversial it was that Warner and the Niners chose to receive instead of kick, the coin certainly has a ton of value.

It's also got a sleek look to it -- on one side it has the two teams' names and logos ... and on the other, it has the Super Bowl LVIII emblem with Roger Goodell's signature etched into it. The piece is marked "00002."

The league said profits from the auction will go toward Luna Strong's Maui Relief Efforts.