Eh, if you have zero sales, you can't really A/B test. Unless there are many people that are getting through to the first step of your funnel, in which case you

Eh, if you have zero sales, you can't really A/B test. Unless there are many people that are getting through to the first step of your funnel, in which case you might be able to run one on that step - but it would be less useful than working on the steps in your funnel that aren't working. You should probably spend some time figuring out which step most people drop off on, before worrying about A/B testing anything.