Billionaire tech entrepreneur Elon Musk has been hawking branded gear to raise money for his latest mission: tunneling beneath roads to one day alleviate traffic congestion.
Yet there's already there's a burgeoning secondary market for the swag.
All sale prices were found by CNBC Make It on Monday afternoon.
Many of the Boring Company hats are listed on eBay for well over $100. The hat highlighted below is on the auction website for $500.