Gil cost for Teleport - Throwing money up in the air while casting?

[RaphaelDDL]

Not to sound like jerk, but honestly, why does it matter?.

As I told, the post is just about sense, not about what matters or anything.

The idea of using an item that can be mined and sold on the market board is a bad idea, because now you're allowing players to control other player's ability to teleport. As you see with many items on MB, the cost of such an item would be ridiculously high. So to avoid it, players would in turn spend gil on the cheap, yet still expensive, item from vendors, sinking large amounts of gil into that way. Anyway you look at it, it would be a MUCH greater money sink then it is now.

Actually on RO you can get the Blue Gem by killing monsters or buying at npc also, pretty cheap (but constant value).

You didn't actually go talk to the NPC who met you when you first went to the aetheryte at L1, did you? >_>
In a narrative sense, gil is actually spent as... Toll.
Literally, every aetheryte camp needs money not just for maitenance, but also because setting up an aetheryte camp is very costly and most of them had to be repaired/salvaged after the calamity, so they are deep in debt with ul'dahn investors, and excerting a toll from everyone who uses their aetheryte as a gate (paying on exit since you can enter anywhere but exit on a gate) is a way they use to pay back their debt.

It's explained by an NPC at level 1 if you remembered to talk to him! He even mentions the true physical cost of teleporting, which is an energy known as anima, yet the cost on the body is so minimal that it doesn't really matters how much you have or how much you spend.

I actually didn't bother reading the starter text (I started the character on beta, so I wanted to maximize my little time on playing rather than reading text).

Thanks for pointing out, I'll start another character just to read it's explanation, this one you provided is actually interesting.