Would be useful if he had all the Prophecies and Core skills. That way, it would make unlocking everything for your characters easier, compared to getting runs to Ember. I know there are people who do that out there. *glares*
I had previously unlocked all non-elite skills for the mesmer class while playing through Prophecies with my Mo/Me. I recently started a mesmer in Cantha so having access to all the skills I had unlocked; Core and Prophecies, is pretty nice in my humble opinion.
I find it very frustrating. Seems like they could use the same set of code that opens up unlocked skills on "early" skill traders in Prophecies to allow chars to see whatever skills your account has unlocked, core, prophecies and factions. Oh well. 100 plat wasted.
He is deffinetly not worth 100k. He has only the core skills that you have unlocked so far. The only advantage is that it is the skills unlocked on your account not just with that character. I wasted 100k. Not worth it!