Just seven verified bidders took part in the auction after two previous attempts to sell the weapon were hijacked by people submitting fake bids to up the price, TMZ reported.
The United Gun Group auction site twice took down listings for Zimmerman’s Kel-Tec PF9 9mm handgun, but added a private email verification process to thwart people trying to shut down the sale.
It is not yet known who bought the firearm.
A user called John Smith made a last minute bid of $138,900 after setting up a computer program to put in an offer with seconds to go.
A man claiming to be Smith confirmed to the Orlando Sentinel that the bid was fake.