I know there are threads every week or so questioning "How to make gold". This is not my issue, I know to make gold, but I would love to share what items/goods I am trading and would like to know what you are trading!
Primal XXX (and buying the little ones, where you need 10 of them)
All Darkmoon quest items
Different kind of transmog items, especially shield, chest, shoulder
Crafting (incl. buying mats cheap):
Ghost Iron Dragonling (Engineering)
All Tinker's (Engineering)
Alle 450 PvP Items (Blacksmithing, Leatherworking, Tailoring)
Imperial Silk Spellthreads - Use Motes from farm for extra silks.
New Crafted Gear (Tailoring only)
Sha Crystals from daily CD and running LFR (Or I'll save them up and make a weapon enchant, whichever is going to grab me the most moolah)
Tome of the Clear Mind - Selling them for 2g each when the market allows.
Ghost Iron Dragonling - Reasonably good seller
BoEs from my solo instance/raid runs for transmog.
After spending about 70k on mounts, still sitting with 75k to spend, need to save up more though, I fancy a magic rooster.