Yeah, that list hasn't really been updated since the patch that introduced desynth. Madman's were such great sources for BC2s for so long, cheaper than Tanes with better yields, but now they're super expensive since GC Seals became required in large quantities out of the blue. All the i55 stuff is now turn-inable for GC seals, and is no longer cheap to make, nor anything that uses the same materials.

I really need to rework the guide from scratch with the new material costs, but that's a lot of work so I don't know when I'll be able to get to it. Stuff like Twinthread and Hippogryph Leather going from 1k to 4k totally changes everything, especially along with all the smaller changes (filtered water going from 1 gil to 1k gil, rose gold and darksteel nuggets going from 4k to 5-6k, etc).

And, I have no idea if prices will re-stabilize back down to the old levels once the zodiac/lucis-rush dies down... And, I have no idea if the economies of other servers are mirroring ours or not.