I would personally guide a few people on how to do it and it's 100% legal.
It does require a little investment (smallest 5$) but the more u invest or more time you spend on it it will increase the profit.
There is absolutely no gamble with this.
Takes about 45 minutes to set up.
I think the price should be the equal to 4 months of earning hence this will never get saturated and after 4 months (depending on time and investment) you will go 100% profit each day.
Not saying I will sell this, but if i would how much should it go for?
There are to many promises like that on the net and on the forums. But i don't like to put even one penny on such things that promise to much but don't give any data on how this money will be made. What is this investments? Explain there all the way to follow and if convincible for sure I will join.
If you look what i wrote here https://bitcointalksearch.org/topic/m.11942987
You will see that i am willing to go first to trusted members and that the earnings they make in the beginning i will take as payment.
But i can't stress this enough I'm not selling this yet (maybe not at all)