Well the really silly thing is that the equipment for Apollo's 18,19 and 20 were all already built and payed for. The rovers, LM's and basic equipment such as suits, are now in various mueseums worldwide, one Sat-V was used to launch Skylab, one is on display at Houston and one at JFK, while I believe the CSM's were used for the Apollo 18/Soyuz mission and the Skylab ones.
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