Someone mentioned augments - I have to disagree. You can very easily buy grade 22 purple augments for 60k each. You can also easily sell those purple materials (4 are required for the augments) for 15k each. If you want to split hairs, you can sell the materials required to make the augment then buy the actual augment for a slight profit.
This is true, but you are completely discounting the prototype (blue) quality augment market, each one can sell for as much as 15k. But even at the low end of ~6k they are still profitable because the subelectronic data modules are valued at about 500 a piece. All the augments sell eventually you just have to be patient and re-post them everyday until they do.