For those of you who are new: the price for main-world lairs is set high to prevent the entire city being bought up. They are status symbols, and a "thank you" for supporting the game with such a large sum of money. You get to pick your spot, pick your lair name, pick the shape, and decide if it's a home or a public venue. Additional details regarding custom main-world lairs are as follows (taken from the lairs sticky):
"Lairs" is the name given to player housing that is placed on the main world map (usually shown in Purple). They are much bigger than apartments, and can be up to a max size of 12 x 12 squares. Full lairs are also custom-built specifically for your needs, so they can be any shape, be in any location on the main map, be any name you wish, and can have many extras.
Lairs cost 150 karma because there are only a certain number of main grid world map squares available, and having dozens of them would leave no room in the city for anything else. As with apartments, lairs can be decorated as you wish, and have their own music playlists for each area. Lairs also have their own private chat rooms that you can use to host live IC roleplay events.
Please note, you may also purchase or create public areas such as nightclubs, cafes, casinos, libraries, and similar. You will still get to decorate these public areas.
Lair purchase is not automatic, as it requires a few details from the party(s) interested, as follows:
1) Owner's in-game name.
2) Desired location of lair.
3) A map of the general layout so I know what shape to build it.
4) Details of extras, such as more floors, terminals, or sewer exits.
You may only own 5 lairs at any given time.
If you are interested in a lair, you should PM Mooncalf before buying the karma to let him know your plans so he can check if they would work.