When you look at an unclaimed listing, there will be a "Own This Business" link near the "Suggest An Edit" link under the NAP information. When you look at a claimed listing, the "Own this Business?" link will not be there.
New advertising option:
A review of your product or service posted by a Sterling Sky employee. This will also be shared on the Sterling Sky & LSF Twitter accounts, our Facebook group, LinkedIn, and both newsletters.