That, and if they're all built and someone has to sell one, it gets auctioned off. If you're building on green where houses are $200 anyway, you're willing to p

That, and if they're all built and someone has to sell one, it gets auctioned off. If you're building on green where houses are $200 anyway, you're willing to pay more for them than someone building on light blue where they're normally $50.