selling business and working visas is a crime. we don't need criminals here. Look for the job from your country and come here in a legal way, to avoid troubles.
Besides, even if you "bought" a work visa, then what? where you are going to work? be aware that you cannot transfer your sponsorship until you complete at least 1 year with the same sponsor. All your movements will be illegal. You will be severly punished once you got caught.