This text is wrong. The Testimony of Retraining is Account locked in all forms so these aren't available.
Please fix his text to correctly reflect that the only way to reset your characters stats/skills is with Item Mall once you've used your free reset [regardless of how long ago it was]
It may confuse many new players to be told by the NPC they can buy them from other players, only to find out paying cash is actually the only way.
Thanks ^^,