Another important question you need to ask is if their budget or revenue criterion matches the range for your product or service offering. If your product plays to the high end of the market and your lead’s budget is low, this just won’t work. So it is better to know the answer to this now rather than in the later stages once you’ve invested more time in the lead.
The barrier to entry into the online market is much lower than traditional businesses, which is great. But, it's a double edge sword because the easier it is to do something, the more people try it out. This means that you have to work harder at distinguishing yourself from the melee of other startups out there - because, believe me, there are a lot.