You may not have noticed, but there was more than one Tesla Roadster on board the Falcon Heavy rocket that launched last week.
Sitting on the dashboard of the Roadster — with the popular "astronaut" Starman behind the wheel — is a toy version of the Tesla vehicle.
"If you look on the dashboard, there's a tiny Roadster with a tiny space man," said Musk after the launch, as reported by CNET.
That toy car is now fetching a lot of money on sites like eBay, with some listings reaching as high as $1,500.
The toy Roadster was released in 2016 as part of Hot Wheels' Green Speed series, honoring speedy electric vehicles.
Last week, SpaceX launched the Falcon Heavy rocket, which embarked on an elliptical orbit around the sun extending as far out as Mars' orbit.
One of the highlights was the rocket's cargo: a mannequin named Starman wearing a SpaceX flight suit and sitting behind the wheel of the Roadster.
Follow Brett Molina on Twitter: @brettmolina23.