Any Amazon listing will have to pass few parameters to generate more sales:
1. Product description and content should be really good and in accordance with Amazon's own algorithm and guidelines. You will need a good copywriter here.
2. You need to market it to correct customers. If not, visitors to Amazon may not click on seeing the listing if if they do click, they might not complete the purchase. You will need someone who can segment the customer and sales pitch for you.
3. You will need a good post listing analyst to see how we are doing and how can we further improve.
4. It will be much better of these three are rolled into one person.
And that is where I step in. I have worked for last 4 years with different ecommerce clients to optimize their funnel, increase the clickthroughs and sales and better their content.
I can do the same for you and yes, only pay after you see the difference. Because I am confident it will happen.
Best,
Jatin