This might be old but... wut?

There's no way that won't reset down to 1 or something like that once you log back in. Why else would he sell it as a full bundle?

In Tespia, when the Elixirs/Power Elixirs glitched and dropped in stacks of 30k, when you relogged or CC'd they reverted to stacks of 100.
If you dropped them in stacks of 100 and relooted, they stayed as stacks of 100. I assume the same thing would happen to these.