Once kidney selling is legal in Singapore, will it enjoy a stampede of kidney-based tourism?  I say yes: Illegal Third World kidney transactions are scary to people from the First World.  So are legal kidney transactions in Iran.  Singapore will be the world’s “go to” place to go for unrationed, legal, First World kidney transplants.  It doesn’t matter if insurance won’t cover it – almost any middle class person from the First World with severe kidney problems would be delighted to pay out of pocket.

Admittedly, this is mostly based on my own introspection: If I was on dialysis, I would already be booking my ticket.  What does your introspection say?