A sales funnel is a marketing system. It’s the “ideal” process you intend your customers to experience as they go from Prospect to Lead to Customer to Repeat Buyer. Sales funnels have been around much longer than web marketing, but the online world is the best thing to ever happen to sales funnels because websites and email marketing make sales funnels easier to build.
Principle of commitment & consistency -- When people commit to something, they're far more likely to purchase from you. That's why getting them to agree to something like a free + shipping offer or by agreeing with something you've said in some way. This is a powerful principle in sales and if you pay attention to some of the best marketers in the world, you'll notice that they work fervently to get your commitment to something, even if it's very small in the beginning.
There’s a better solution: Build out an automated email follow-up campaign that speaks directly to this objection. Any time you encounter this problem, you can send that prospect information that seems designed just for them. A multi-month educational campaign may reduce their content anxiety and nurture them toward a sale. Yes, it’s work up front, but once finished, this campaign will work for you always.