I haven't spent a gil on gear for any of the jobs I've worked on currently. Get retainers and store your gear rather than throwing it away, at least if you plan on using it for other classes. It will save you money in the long run. I've got a huge stockpile of excess gear, but there's no reason to sell it at the moment so long as space isn't an issue. With the Armory chest and 2 retainers, you really shouldn't have space issues until very late in the game.

You wouldn't get much for your gear on the AH anyways. It's free to everyone through quests, and with the amount of players grinding quests right now, the AH would be flooded and prices would be low.