You'll get a chance to buy some more today at $30. Go for it!
It's a long term investment. Just buy the shares, get your certificates, and put them away in a safe place. You'll be able to pull them out and tell your children about how stupid you were someday with the worthless pieces of paper you spent their inheritance on righ there for them to see.
When the lock out ends that will be the time to buy IF there ever is a time to buy. FB has everything going against it. Even MS downgraded it on the day of the IPO to their (FAV) clients. Sell and buy back cheaper> a Lot cheaper! I see this in the low 20"s