No one is selling low level gear at the moment likely due to the fact it's such a pain in the ass to create. While I love that people are selling things like sheepskin harnesses for cheap, not many other crafters are.
And so in the long run you get rank 20 gear selling for over 50k. If anyone is selling at all.

I wouldn't say gil is easy to get right now, at least not as a new player. Not for everyone at least, particularly not those who don't understand that this game is not like other MMO's. I had to explain to a new player that materials were provided in the DoH leves. He thought he had to provide them himself.

Check out that Dev post on the update of new gear, you'll notice lower level gear will become a lot easier to manufacture. If at that point you're still hurting...

Put it this way, it's an MMO, at some point to progress you WILL need to speak to someone. I only hope in the future our retainers will have more slots to sell things so I can put up more than 10? of the same item to sell to low level DoW/M. But if at any point in time during the game you can't find something, but are willing to pay for it in the end, just shout for it with the reward.

Honestly it's not a hassle. There's no way we can read your mind for what you want, or know when we've sold out unless we check every half hour.
Some of this is on the end of the player desiring the item too. If you're unwilling to shout for something, then please be patient. There's just no other way than that, or to level up the class itself. Crafters won't all bite, and if you can't come up with a compromise on price (Trading shards to offset the cost of the item, or provide a few of your own materials) then move on.

tl;dr: If it's not up in the markets post 1.19 you may as well shout for it. It's an MMO, you'll have to speak to someone eventually.