The OP is specifically asking for what individuals charge and not consulting firms. I think it's important to point out that part of the reason why individuals

The OP is specifically asking for what individuals charge and not consulting firms. I think it's important to point out that part of the reason why individuals can charge rates comparable to large firms is that they offer a more personal experience. You end up with the person you talked to. Moreover, individuals are better for jobs that have a smaller scope. A large consulting firm won't lift a finger for a "small job" unless it's a recurring/maintenance component of a much larger job or unless they can charge at truly insane rates (1000's per hour) which desperate clients are still happy to pay for sometimes.