For quite a few weeks now, I've been earning 200kcr to 500kcr per weekend by selling elite module trinkets. I make a bit more during the week, but friday night to sunday night are by far the largest sellers. You can buy all materials you need and CE (no mist) off the AH and still earn a huge profit. I typically sell 8 to 15 of them per weekend.

The modules that sell the best are, in order of sales:
* Elite Sword Focus Module
* Elite Slash Module
* Elite Quick Strike Module
* Bomb Focus Module

I've tried selling the handgun modules and the bomb damage modules, but they frequently don't sell at all and you get dinged by the listing fee.

Note that the price of materials for these items have dropped since I am no longer buying them. If you go into this market, expect the prices to rise again. Some of the mats that I've run out of include things I didn't expect, like unstable cores and force dynamos, but if you are like me, you probably have a huge amount of mats that are just sitting around.

Why am I letting this info out? Well, I've pretty much quit playing. I've let my trinket/weapon slot upgrades expire, I've sold off all my CE, and I haven't even logged onto my main knight in days. And, without me selling these modules at reasonable prices, people are selling them for 200k profit per module. I feel bad for players who pay that much, so I'm hoping someone else will step in and make some easy profit while providing a useful service.