Quote Originally Posted by Swag View Post
There are good margins in HQ refined materials (even the low tier stuff) if you're willing to sell singles and babysit your auctions. If you don't play frequently or are looking for lower-maintenance sales, I'd recommend high-level food, DoH/DoW jewelry, and 40+ crafting gear. And, as always, pay attention to your spiritbonding. There's good money in III/IV materia these days.
Materia will remain a market for quite some time to come. Simply because it's an RnG system and it won't always give you what you are looking for. Even in the notorious end game, there will be a need for multiple sets of the same gear based on Materia. A reasonable goal will be to have an Int and a Mind based conjurer set. One for healing, one for just running around clobbering stuff. True for all classes in differing conditions.