Queues and their uses

Why QUEUE?
As in most things, there is good reason, but again, whether it's effective or pure silliness, would depend upon the circumstances.
In school, children queue to buy food during recess. That's to minimise accidents, injuries to other children who may be on the receiving end of a hot bowl of noodles.
At bus stations - commuters queue to board the bus orderly, again to minimise injuries that may be sustained should a person loose his balance and falls onto another.
At the airport, passengers board according to sections of the plane - after seating pregnant passengers, physically challenged individuals and parents with young kids - the reason is obvious - seats have been allocated prior, and it's just keeping the order.
When we pay bills, we queue to use the machine or to step up to the counter - again, it's keeping order.
We queue to maintain some order to prevent mishaps.
Question:
Why have a queue system for buying a $6m property? It's not $6 where 4.2m people could afford to purchase. When I was told of such a system, I was quite put off.
As a buyer, I would have taken my money and went elsewhere.
To my understanding, this system was put in place to give buyers an idea of the property's exclusivity.
What these people underestimated was how snooty that came across -
If a higher profile was the goal, then the method was all wrong. It's like placing an advert in the Fortune 500 magazine, and telling people that you've nominated yourself as the top 10 income earner in the world!
These people better take their property and keep it in the closet.