Just make the things nodrop?

[xCry0x]

I'd believe the larger concern is around guises. Farmed manastones get into the economy.

You would end up seeing a group take the camp and hold the camp until they each have a guise on a pile of level one alts.

If you think manastones sell for a lot, you should have seen what delf mask characters sold for when character selling was allowed.

To that end, making manastones no drop would probably be worse. Instead of "needing" one, people would argue they need one for every character they might want to play since they could never trade it to an alt.