Well not sure what can be done about it but wow, collusion really screws up this game.  Played in a game today where last place player bought third place players crystite for 204 when 1-2-3 were extremely close. 

Kinda ruins the game when things like that happen. 

What does the color change in the land selection mean anyways? 

My vote would either be for :

1. if two people click during that duration on the same property than give it to the one with the lower rank [as opposed to first click]

or

let people select up to four plots prior to land selection (choice 1,2,3,4)