Uhn... Well, the Allagan Tomestones are ancient allangan storage devices, yes. Right now nobody can actually read them, exception given to the Garlond Ironworks and perhaps the likes of Nero's research team.

And here we have a mysterious arms dealer trading relics of great power of the as many of those tomestones as we can unearth from ancient allagan ruins.

One has to wonder, what is she doing with those.