I have a standing offer to anybody to pay them 100% of the profits off of anything they create for 12 months for my product.

I've offered higher amounts as well (200% of profits, 120% of sales) in order to incentivize people to try.

In my experience it's really hard to find qualified sales people and the time investment in finding good people is expensive so by being too cheap, you end up spinning wheels, making no money, AND wasting your time.