I'd like to raise my rates too. I'm not an expert at security by any stretch but I don't completely fail at it like ~70% of the code I inherit.
But it is difficult to figure out how to sell that. Most clients don't seem give a shit about security until they've actually lost money due to it. It's also hard to prove that my code will be any more secure than the next guy.
This is IMO one of the strong benefits of daeken's course: he's formalized it to the extent that you should be able to turn it into a selling point if you wish to do so.
