Are you comparing apples to apples?
My panels are 3d machined front and back which increases machine time drastically and by 3d ULE milling them it removes the max amount of weight. The shops I see charging $50 plus per set are just making flat panels with rounded edges and no ULE milling. The way I make panels have very low margins and are very time consuming to make.
Does that devalue yours? Probably not. The value as I see it is the panels don't exist today but for a small cost they can, there in lies the value.