Very well put nitrostarter. If I were selling R/C stuff and decided to make a few bucks selling Lipos I would most definitely purchase my Lipos from HK, because I would end up selling the cheapest batteries and not have stocks just sitting on the shelf. Simple economics. And 30% is not unreasonable for mark up, but some are charging 100% and more trying to get rich.
The good thing about my LHS is that the manager asks me what BL and Lipo products are worth having. Of course i usually refer to RCM to answer these questions