Interesting. Although I'm a developer, I was forced to take some sales training courses when I worked for Xerox. Imagine spending three weeks in a hotel suite in El Segundo with thirty salesmen & programmers.

The essence of what Xerox taught was: to sell, find out what problems your customer has, and figure out how your product/service can help him/her solve the problem. That's it.

Xerox was very good at sales.