You're entirely incorrect. I've made well over 100 million selling those and augments. You can easily sell them for twice their worth at roughly 20-30K profit per item. This greater than the average margin on Synth and Armor augment sales. The difference being the high volume at which you can move augments, but that requires a lot more effort to stay on top of fluctuating augmentator prices and withstand the peaks and valleys.
And you could have made 300 million doing something else with the same time and effort.