1) How is your content targeted conversion rate, did you generate any sales from it?
This will depend largely on industry and competetiveness of said industry. And your quality score as well. And your copywriting. And you landing page. And, and, and....
Personally, my content conversion rate is lower than on search, but I do generate sales from it. (otherwise would not use it)
2) How much you usually bid for a click for content targeted ads.
I usually bid as low as I can for clicks on the content, while still aiming to have an average ad position of about 6 or better. These clicks are generally not the same value for your money as search clicks.
3) Do you include your product price in your content targeted ads?
I see lots of people who do this in my industry and others, but I personally don't. I don't think it makes good ad copy. :)
These are only MY personal experiences. Some people here say that content converts great for them, others say they'd never use it again. It's a matter of trial and error and experimentation is going to tell you what works for you better than any answer here.
The reason I'm going for about position 3-8 isn't because I think those are "good" positions, it's because that is all I'm willing to pay for due to quality of those clicks.
Your question should be directed at yourself... something like, "Is position 6 good for ME?" And the answer should take into account everything from quantity to conversion.