How much are SpaceX tourists actually paying to fly around the Moon?

Two mystery space tourists put down a “significant deposit” with SpaceX to take a round-trip around the Moon, CEO Elon Musk announced yesterday. Musk didn’t say much about the two unidentified passengers, let alone how much money they’re shelling out for their Moon voyage. Turns out, it’s remarkably difficult to guess the costs of human spaceflight.“There’s not just a line item that says, ‘Send this person to space.’”
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