I can't speak for anyone else, but for me, sending my retainers out to get things that sell well on my server while I am doing other things makes them profitable. Dhalmel Hide, Chimera Manes, Aurum Regis Sand, Birch Logs, etc. basically endgame crafting mats, particularly the ones that are hidden in the nodes and don't show up regularly (Hardsilver Ore, Titanium Ore, Birch Logs, etc) can sell well... though less so this close to another xpac. Your servers economy will obviously dictate what sells and how well. Your server population will also impact it. If you're on an overpopulated server, the vast amount of competition will stymie prices on pretty much everything.
