Useless seals exchange

[Mirage]

I'm not sure how hard it would be to add such an NPC really. Perhaps they could have reused much of the system that's used for current guild merchants?

It could be a normal guild shop (programming wise), except what was for sale would be seals, and instead of costing gil they'd cost seal-creds. And instead of being paid gil for selling seals to the merchant, you get paid sealcreds.

Lately, I've also been keeping a few seals that aren't relevant to my jobs, just in case they decided to implement a seal exchange system.

A different solution (at least when it comes to seal drops from quests and such) could be to be able to tell the abysseas NPCs which seals you would prefer. While this perhaps shouldn't make your seal of choice be the only drop you'd ever get, it could increase the chances of getting a seal you want significantly, perhaps making it over twice as common as other seals.