An alternative to e-books

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Maybe classes would be the best thing to sell.  People seem willing to pay decent money for classes.

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I don't know how you would do them.  For credibility, you make videos.  I have seen this model in marketing areas.  People make videos and then sell classes.

Allen wrote

How would you do them and get credibility so that people wanted to take them?

Word of mouth. People who's got a way to gather clients offline will eventually attract clients online as well, because there's already a real, satisfied client base, and people will sense a degree of trust, so they'll look up your sites/profiles. It's very hard to build it from scratch strictly online, especially if you want to sell your stuff outside your country.