one cartel market or legacy perk which i know alot of people would love is to be able to mail actual gear to and from different toons in one's legacy. This should also include the gree helix components you get from the gree missions since they are used to buy legacy bound equipment.
I mean i would pay real money to be able to do that. it would make gearing up other toons with hand-me-downs so much easier for gear up with gear that i don't use anymore.