Suck it up, buttercup. Buying links is not illegal. It may contravene Google's guidelines, and if so, Google may or may not do anything about it. That's life.
Besides, what's unfair about it? You can buy links too, or not. That seems pretty fair to me.
Get over your poor, complaining attitude about being beaten in business first. Then you can treat this as a risk appraisal decision.