A few years back I did some back-of-the-envelope calculations on lifting stuff off the moon. At the time there was a company offering $200k/kg to lunar orbit,

A few years back I did some back-of-the-envelope calculations on lifting stuff off the moon. At the time there was a company offering $200k/kg to lunar orbit, $1.2M/kg to the lunar surface. The Δv to climb back up is pretty much the same as the descent so I would expect the cost ratio to be similar: Thus $7.2M/kg returned to lunar orbit. At the time I wasn't concerned with going farther, but the escape/injection burn is about half the launch burn--thus you're looking at something like $17M/kg not counting the heat shield and chute (numbers I can't even back-of-the-envelope.) How many objects are worth $17M/kg?