You can get each Aegis for a bit under 2M if you're lucky (I was wondering the same thing as you just today - one of the pieces was down to 1.4M). To craft it takes this stuff
. The commons are only 10 dil each, so that's not even a thing, but the uncommons are 1000 dil each, and go for about 100k EC each on the exchange at present. So as of right now, if you have the other stuff
and just get the uncommon mats on the exchange, it is cheaper to craft, but not by a whole lot.
Selling antiproton stuff on the exchange looks like a good profit, even if you get the uncommon mats from there too.