Math Regarding Maximum & Minimum Gains

For maximum gains, you get:

• 1x Cellar of Wine (12.50 echoes)
• 241x* Bottle of Greyfields 1879 (2.41 echoes)
• 18x Bottle of Greyfields 1882 (0.36 echoes)
• 10x Bottle of Morelways 1872 (1 echo)
• 1x Bottle of Greyfields 1868 First Sporing (0.20 echoes)
• 6x Bottle of Strangling Willow Absinthe (3 echoes)
• 2x Bottle of Broken Giant 1844 (5 echoes)

In total, you gain 24.47 echoes worth of Wines items from the transaction, and lose 12.50 echoes worth of Shards of Glim, for a total profit of 11.97 echoes.

For minimum gains, you get:

• 1x Cellar of Wine (12.50 echoes)
• 0x** Bottle of Greyfields 1879 (0 echoes)
• 1x Bottle of Greyfields 1882 (0.01 echoes)
• 1x Bottle of Morelways 1872 (0.10 echoes)
• 1x Bottle of Strangling Willow Absinthe (0.5 echoes)
• 1x Bottle of Broken Giant 1844 (2.5 echoes)

In total, you gain 15.61 Echoes worth of Wines items from the transaction, and lose 12.50 echoes worth of Shards of Glim, for a total profit of 3.11 echoes.

As for obtaining the Shards of Glim necessary for this card, it can be most efficiently acquired through either putting on a play at the Empress' Court, or purchasing it at Merrigan's Exchange with echoes sourced from a 5 EPA grind, both requiring 6-7 actions to gather the required Shards of Glim.

You should still do this despite the meager EPA, though, because there's only just around 129,000 of these deals left until it's all gone. And you wouldn't want to miss out on those deals, now would you?

(*) At Base Persuasive 230. (**) At Base Persuasive 0, which is technically achievable through an unadvisable amount of Persuasive-reducing activities.