Cardi B threw at a concertgoer is being auctioned off for a good cause. Following the July 29 incident in which the 30-year-old rapper responded to getting water splashed in her face by throwing her microphone in the crowd, an eBay listing popped up purporting to be auctioning off the audio equipment in question for charity.According to the listing, the ad was published by Scott Fisher, who owns The Wave, a Las Vegas-based audio company that provides audio support to many nightclubs, including Drai's Nightclub, where the incident occurred.To authenticate the item, Fisher promised to include a letter certifying it and also noted: «There are literally tons of links to videos all over the internet.