Should I sell Facebook?

[Common Sense]

Interesting..... you've got a price target but not a loss target to bail.
There's an old famous line in investing;
"Amateurs ask how much can I make..... professionals ask how much can I lose"

With 20 shares..... a significant amount of your profit will be eaten up by commissions.
On these 20 shares you've made about: $63.00, with an average cost of a trade at $9, your net
gain is $45. So your commission (in/out) is about $28% of your profit!!!!!!!!

What's worse...... you had no exit plan & you're looking to strangers (whose qualifications and motives can never be known) to tell you how to handle an IPO which is just about the hardest stock to judge for price action. I don't get it.

You should get out for only one reason.... you don't have the experience to handle this trade. It's worse than gambling.