Don't know much on the subject, but it seems that you would price your product based on your standards of 1. Does my product achieve the look I wanted? 2. Does my product function the way it was meant to? 3. If created by someone else, how much would I be willing to pay? These are hard questions to answer as everyone has different opinions on how much their time, effort and skills are worth. I however do wish you all the best on this.