The reason for the price difference is because oats and wheat flakes have similar costs and while oats do not have gluten; off the shelf oats are not gluten free due to stray wheat growing in the oat field. To get gluten free oats, the farmer must take (costly) precautions to prevent contamination. I won't weigh in on self-diagnosed gluten sensitivity, but if you don't have a severe gluten sensitivity paying extra for gluten free oats is a waste of money. The trace amounts of gluten in off-the-shelf oats won't affect you.