(the password is the "secret" place where the treasure is)
So my suggestion is this:
Why not Rev make some number of passwords (places where different treasures are hidden) and when we enter one of those passwords to be able to get different rewards. The harder the password, the more expensive item you get. I saw that there are many items implemented but not in-game. The items will be limited "editions" and that would make the players rush early in the set for them
The passwords can be hidden in the BM history or could be taken from a crime or even snitch info. That way the players can experiment and find new things Here's and example:Password: Revenger
Crime results: You try to sneak into Rev's house but it's guarded by Bruce Lee.You get into a fight but you lose. Come back when you are prepared. (bruce lee is little tough but the reward is enormous)
If u succeed: You sneak into the house and no one saw you. U open that big safe in the basement and you find the holy grail.
That's my suggestion and i hope you like it
But our first task would be to recruit as many players as we can and teach them how to play the game so that there would be some competiton.
Peace.
if Rev puts it on the market it wont have any real value 
far more better to loot it from different crimes. the fifth part could be from the state treasury crime (random drop, or specific score) Or another idea: Imagine a second immposible. every player brings part of the treasure map and the loot is random. the treasure map's parts will be extremely difficult to find. specific scores, difficult crimes etc..