Myself personally, I have been charging $150 up front for local small businesses. I live in a very small area. All I offer is verification, filling out the main information like description and hours, adding a few additional information subjects, and taking up to 5 pictures to upload. There is no reoccurring payments right now, but most of the clients I have had do not need anything more than this. The population here is only 20k, and half or more of that is college students. I'm screwin myself over on the residual income, but building up a portfolio and reference list before going to metro areas and charging more.
Before anyone says anythin about me charging so low, there are many businesses in the area who can't even justify $100 for advertisement. Most advertisement around here is word of mouth or personal signs in front of their business. While yes, the services are worth more than this low amount, for someone just starting its worth the easy income. Local lawyers and used dealerships have worked out well for me. Specially with explaining the importance of smartphones and that 40% of users viewing GP is from phones. If the business has a website, upsell the smartphone usage and that their site will load slower on a phone. If they have no website at all, GP and Bing Local gives two websites for their business.