The devices, priced at Dollars 500 (approximately Rs 33,700) apiece, are being marketed and sold through Musk's other company, The Boring Company, which was set up in order to set up a subterranean transit network under Los Angeles to beat the city's endless traffic.
The remaining 19,000 flamethrowers will be shipped to customers, but those lucky enough to attend the pick-up party were allowed to test out the device on site, by roasting ... what else?
The disclaimer also mandated that consumers check off several boxes under the prompt, "I understand The Boring Company isn't responsible for anything I do, no matter how genius or stupid".
But now the $US500 device is selling for anywhere between $US3,000 and $US5,000 on eBay, as was first reported by CNN. You can buy one for $500.
Musk had earlier sold 50,000 hats to help raise money for the project.
'America's Got Talent' victor Neal Boyd dead at 42
The site reported that no autopsy was carried out as Boyd had long suffered from heart failure, kidney failure and liver disease. Boyd released two albums following his AGT victory, My American Dream in 2009 and My Christmas Wish in 2013.
With 20,000 flamethrowers soon to be in circulation, expect more flame-throwing displays on social media.
The "Not a Flamethrower" devices were the second product-driven fundraiser supporting the Boring Company's cause.
As of April the company said it had raised over $112m in equity, 90% of which came from Musk himself.
Have a look at the flamethrower in the tweet below and give us your thoughts in the comments. The electric sled would allow for cars to be transported at 150 miles per hour through the tunnel, Musk has said.
Musk announced a year ago that The Boring Company had received a permit to build an underground hyperloop tunnel between New York City, Baltimore, Philadelphia, and Washington, D.C. The tech billionaire shared pictures of distributing his most popular (and most controversial to date) fundraising technique for the Boring Company today via his Twitter.