With a high Persuasive cap, you can source Romantic Notions fairly easily from Mrs Chapman's, making this possibly the best direct source of Greyfields 1879 for late-game players. Good for if you need a lot of them for the Presumptuous Opportunity card, etc., though still not as good as some high echo grinds.

At 24 Romantic Notions per action this comes out to ~208 Greyfields 1879 bottles per action, making this equivalent to a ~4EPA card assuming you'd otherwise just buy the wine at Bazaar markup.

Feel free to double check my math: 900 bottles / ((80 Notions / Notions per action) + 1 action overhead on this card) = bottles per action

900 / ((80 / 24) + 1) = 207.69 bottles per action at Persuasive 218-230

900 / ((80 / 22) + 1) = 194.11 bottles per action at Persuasive 192–202

900 / ((80 / 12) + 1) = 117.39 bottles per action at Persuasive 131–136

Persuasive 131–136 seems like the lowest cutoff, otherwise it's better to just do Unfinished Business in Veilgarden.