Sales and Marketing

I need some help with selling something. First thing first, please pay attention for this : NO EXTRA CHARGES until 10 copies sold. Ok I am looking freelancer who can sells my product (eBook) more than 50 copies, more better. Currently I use Rocketr to sell my product. Do you prefer sell by your own method? I'll give you the material after we start the project. After you reach my target or more than 10 copies, you can give me extra charges, I'll include it on the milestone before project ended. (Max. $100) Please give me your proposal how many product can be sold and how you sell it, by using Rocketr or your own method. Thanks