We did a similar campaign for our family business, with a much smaller budget (and area). We received a lot of likes, I think we spent $50 total and got about 1

We did a similar campaign for our family business, with a much smaller budget (and area). We received a lot of likes, I think we spent $50 total and got about 150 new likes. The value for us was not click-throughs to our online store, but the ability to directly communicate with our customers. We run special Facebook specials, and let people know when we get new products they might be interested in. If we have something we really want people to see, we can run a sponsored story. We've had a few people come in looking for deals we've posted on Facebook, so we know at least some people see them. I'm not sure if it has paid for itself as far as pure revenues are concerned, but I think keeping customers informed and aware of your existence is a little undervalued currently.