Hey just sharing my experiences with building a list using facebook. Here's what has worked for me so far:

1.) Create a facebook page on a specific topic. Pages that have had good response were based on a hobby, interest or something that people are passionate about. (E.g. "I love golf", "I am Vegan"). Make sure you name the page carefully, as it forms the headline of your facebook Ad!

2.) Post some initial content to your page. This can be done easily...