Talk:Guild Line/@comment-50.65.177.233-20200927220228

It is a repeatable quest for delivering 10 potions, 5 mana potions, and 2 panacea.

The combined cost of these items in these amounts is 1400 G. The quest reward is 2000G and 400 EXP.

And since the max carry capacity is well over 99, you can go purchasing several hundreds of the supplies at once, then cashing them all in one after the other.