Need sugestions

Ok I'm really new to Facebook, I created one page named something like this "Get new Facebook chat here,for free" (only, on mine language) on February 1st and I didn't done any promoting, just invited like 20 my friends.
Yesterday in the morning I checked it and it had around 30-40 members.
But yesterday in night, I checked it and it had 2900 members. I was like WTF.
Now it have over 5400 members and get new 50+ members each minute.
I will try to monetize them with SMS page lock (fortumo)
Anyone have any tips about monetizing?
(I said that I'm going to send them link for downloading after they invite their friends, so most of them is willing to fill out some offer).
And if anyone wants to buy page, contact me please.

PS. Most of members is from Croatia,Bosnia and Serbia.

Thanks.

Anybody willing to help me?

PS. Page now has over 7500 fans

Page now have over 21000 fans and I'm earning about $60 daily on autopilot.
Because I think of selling it later, what would be fair price for it?