I craft mostly crafting supplies like darksteel nuggets, twinthread, and hippo leather and toss in Bouillabaisse.. all hq, and I typically sell them (except the bouillabaisse) in stacks of 50-99. MOST end game lvl 60 crafters don't want to mess around with gathering and refining, I'm lvl60 in all gathering and crafting, so it's all easy for me to get my supplies and craft usable products. When I was lvl40 and up, I crafted rings and bracelets than weren't necessarily class specific. Also, toss in a melded item once in a while for some extra quick cash. For example, about 2 weeks ago on Brynhilder, HQ Aetherite rings were selling for 30-50k a piece (2 months ago they were 5000g). I whipped out a couple and attached Command Materia III (which I had about 25 of) and they sold for 50k each in about 5 minutes. If you sell in quantity, either stacks of 99 of short stacks of 5, price accordingly.