Using NPC's you could buy property You could use an NPC trader and assign it to a realms zone Then players could buy that zone off the NPC - using iConomy When the transaction is complete the npc plugin runs /realms grant $playername all $area or something like that I think this would be very cool!
Every world protection / area defining plugin should have a command that allows players to buy chunks for a flatfee. Purchasing a virtual permit would allow players to buy them from a npc, without needing hundreds of npc's running around. Example: PlayerX12 currently has 4 permits. *hits something with a designated trigger (for instance a gold shovel) PlayerX12 just used a permit on chunk: {x=0, y=10, z=0}, 3 permits left Alternatively a permit handler that can tie into some/all/the most popular protection systems would also be awesome. Setting up all the zones players need/want is tiresome work even if you are only managing a handful of users. Let them just do as much of it as possible ;-)