Use Facebook As One Step In Your Marketing
Or they know they want to buy it and will perhaps next week, they are actually ready to buy. Then there are other industries where there would be more of a process before, more things would need to happen before they finally buy from you.
Now, Facebook can be a great tool to use in one or even more steps in that process. Basically by that I mean Facebook could be used as a tool, a funnel to bring people into part of that process, part of the buying process.
So consider how you can use Facebook as one or more of the steps in the buying process that your target audience need to go through with you.