When an NPC doesn't explicitly refuse, it means there's room for negotiation. At this moment, Da Fei knew he'd found the breakthrough.
Think about it, Miss Saphen is at least the reception hero of the Siren Clan. Maybe she doesn't have a whole set of Divine Artifacts like the Dark Tide Temple Chief, but it's not surprising if she has one or two. The Chief was tempted and promised that you could choose any artifacts, meaning trading Divine Artifacts in-game is entirely possible!
Da Fei excitedly said, "Miss Saphen, I've visited many prosperous major factions. Although they have ample goods, they rarely trade Divine Artifacts. Our Siren Clan may not match those major factions in terms of goods, but we need our own unique features to stand firm, right? So, while major factions are unwilling to sell, we should sell, and—"
