When I opened a Facebook page for my cut coins Facebook told me I needed to reach 50 likes to get feedback from them. After 50 Likes I started to get a weekly synopsis of visitors its was interesting but not really useful.
The next target is 100 likes then something else happens..
So if you are bored do a search on Facebook for Numismatic jewelry and if you like what you see click the like button
I have only ever made one sale through Facebook I use it mainly to tell people when I am going to be at the farmers market or a craft show. So no sales pitch I just what to see what tools 100 likes opens up for me.