Before hiring the next great sales professional, you have to decide if you're in a willing to create a commitment to training, developing and managing them. If you're not in that position, do everyone a favor - don't hire them.
Next sale aren't robots you wind up and send out the door to simply sell stuff. If it were only that easy. Like everybody else in your organization they have to be managed, developed, and educated. In this case they have to know the product offering, the sales process, the mark market, the messaging, metrics, expectations, and management program. If you don't have an excellent handle on these aspects in your own business, what makes you imagine that any sales rep only will figure it out and become successful? As an experience has demonstrated time and again, they won't.