Teeth whitening is very cheap, you can buy teeth whiteners over the counter in the US, and most toothpastes you can buy in the store have whitening agents in them.
Are you sure? The handful of times I've inquired to an acquaintance about freakishly white teeth, they've always said it was just because they took really good care of their teeth, didn't drink coffee or soda, used whitening toothpaste, and had good genes.