Nevada sound producer Fisher has 16 identical mics. Cardi B hurled the one he auctioned into a crowd on Saturday when a fan threw a drink at her during a concert.
Millions watched Las Vegas incident videos. Fisher will donate the auction proceeds to veterans and special needs charity next week.
Fisher, 55, dubbed the mic a "piece of hip hop infamy" on eBay, but the overnight bids surprised him. He stated the concert-use Shure Axient digital mic costs roughly $2,000.
Cardi B said "somebody splash me with water" before the incident in concert videos shared online.
Videos show a fan throwing a drink at her during "Bodak Yellow."
performer flung the mic into the audience, apparently upset that the drink got in her face.
Pink posts a video of a heart on a cloud to remember her late father.