Can you sell your properties for cheap to another player in Monopoly?
Yes, you can sell your properties cheap.

No, you can't do this when you are resolving payment for the space you landed on.

From Can you force property onto players in Monopoly


  The only time a sale cannot take place is if a player will be cheated.
  For example, Player A lands on Boardwalk with hotels and owes $2,000
  to Player B. Player A cannot raise enough cash or make a trade with
  Player B, so he is effectively bankrupt and should turn over all
  assets. Player A would not be able to make a deal with Player C to
  sell some properties for less than their value (say the red properties
  for $1) since that would cheat Player B. He could sell them for more
  than their purchase value, however.