That all sounds good, my only thought is if you are charging $5 for something your market is used to paying $600 for, you may appear to lack credibility... imagine going up to a guy who gets $100 haircuts and offering him a haircut for $3. Would he take the risk of getting a $3 haircut, even if it looks like it would be just as good as his usual $100 one? But, of course, if they're getting other stuff than just the data for the $600, offering just the data for $5 plus expensive modules might be perfect ^_^
