Aren't you ashamed of yourself for peddling crap that can't sell on its own merits if people see it in writing, study it, and proactively seek it out if it's worth having?
We weren't "peddling crap." I worked in the travel industry, and my employer was the oldest (30 years), largest, and most successful in its sector of the industry. Most of our customers returned again and again for our services. A few had been with us from the beginning.
The fact is that, whether we like it or not, a salesperson will bring in the business, and as I already said the telephone is the only way to widen your market. Glossy brochures are only a small part of sales. Someone has to follow-up with a call.