Your reputation is at stake. If you steal one, be certain that he or she is NOT to bring anything from his old company. No customer lists, customers, prospects, training programs. Everyone from your industry is there. This arena is especially good for finding unhappy salespeople in non-competing companies, but familiar with your customers and your industry.
Trade shows are the most fertile and least politically disruptive area to find great sales people.
Business meetings, chamber of commerce events, and business groups can provide a great connection to the right person. Word of mouth to the business community through your business friends. Like networking, use your business reputation in the community to get the word out that an opportunity exists in your company. Your present sales team. Yes, you can advertise but be creative.