Locations Level 50 - 80
These are the earliest levels that you can start farming in Everquest and are the easiest locations to make plat. I'm not suggesting that during these levels you'll make some good money by stopping and hunting enemies - but if you're having trouble leveling because you need to buy some gear for your characters or spells - there's a few locations I can recommend you farm for a day or two to make some plat.
Note: All of the locations mentioned in this section are extremely easy. Someone whose Free to Play with no AAs and only a few pieces of Defiant Gear can hunt at all of these locations.
Shared Valuable Loot:
Intricate is the most valuable + fastest selling Defiant you can get your hands on.
Locations sorted by difficulty (easiest first):
Rathe Hill Giants - Everyone who plays EQ should be familiar with this location. This location is the easiest farming location you'll come across in EQ. On live servers you'll rarely see anyone here farming these guys so it's a good location to stock up on some plat. Don't expect to get rich hunting here, expect maybe 3 - 5k an hour.
Ocean of Tears Cyclops - If the Rathe Hill Giants are the easiest farming location in the game, this is the second easiest. It's also a lot more antisocial than the Rathe Hill Giants, not many people have reason to come to OoT anymore. The Cyclops you'll want to farm are found on Seafury Isle and drop a decent amount of plat per kill in addition to gems that you can sell in The Bazaar.
City of Mist - This zone is found just off Emerald Jungle and it'll be pretty tough for you if you're level 50 without a group. If you're between the levels of 50 - 70 I'd recommend only come here if you're boxing or twinked out the butt. In this zone you'll get a decent amount of raw plat from mobs, defiant gear (including the extra valuable Intricate Defiant) along with an extremely dense mob population.. Meaning large pulls if you can handle them/AoE farming.
Old Sebilis - A little bit harder than City of Mist but even better money. Again, players between the levels 50 - 70 probably won't make the best plat here unless they've got a group or are boxing a few characters. If you're 70 - 80 you'll likely be able to AoE farm this place and get 10k + an hour.
Dulak's Harbor - The enemies you find in this zone will be lower level than Old Sebilis but they'll likely hit you harder since this zone is 5 expansions ahead of Dulak's Harbor. The mobs here don't drop as much trash loot as Old Seb/City of Mist but you can expect an extremely dense population of humanoid enemies that a level 70-80 could annihilate.