How much would it cost them to pay someone to research this information? Probably it would take up a few hours a week. So maybe something like 3hrs / week * $20

How much would it cost them to pay someone to research this information? Probably it would take up a few hours a week. So maybe something like 3hrs / week * $20 / hr * 4 weeks = ~$240/month. And don't hesitate to give them a widget linking to your site for "more information."