Are you selling exclusive rights to the code, a license to use the code or the software copyright? Will there be any agreement that you can not resell your code to others or reuse it yourself? Will allow others with serous offers to audit your code prior to purchase? To be honest, the website very simple and the idea isn't unique.
- I'm selling exclusive rights to the code
- Yes, I will sign any non-compete clause
- I won't allow to inspect the code but I will make sure that everything is tidy and well commented
This sale is not only about the code but also about the traffic and the reputation of the website. After all, the site makes 15 BTCs / month.