How to play Communist Monopoly:
All the properties would not be for sale. They are all owned by the state.
However you would have to pay rent for landing on any of them. You would still get £200 / $200 for passing go. After every 10 turns, the people would collectively decide where to build houses and hotels using the money everyone has paid in. The game is won once every property has a hotel on it. Everyone wins.
However it is critical that there is true communism. Corruption starts when one person plays the banker. And another person is responsible for receiving all rents from players.