So I was buying Jazbay Grapes from a guy, that told me he couldn't stack them (he had a couple of them and I asked after). After I bought them, I couldn't stack them myself and it didn't bother me much anyway, since it's the same mats right?
WRONG.

This is the lvl 35 epic recipe for some Wine. Notice it says 0 beside Jazbay Grapes.(The background is bugged at this location - Eastmarch, Windhelm, Oaken-Hulls Emporium, prov crafting)

This is the VR5 recipe for Jazbay Cabernet. Notice it's the same name and icon,
BUT it says 42 Jazbay Grapes.

Notice that the Jazbay Grapes can be sold for 42 gold, while the other provision mats sells for 0 gold.
However the Lado Grapes I just bought from the npc, can be sold for 1 gold.
My thoughts:
The VR5 "Jazbay Grapes" have been bought from an NPC, which is why it can be sold for gold. This can make a lot of confusion for the buyers of these mats and the people who are going to use them.
Name: Zaky Warbringer
Level: Veteran Rank 12
Class: Templar
Race: Imperial
Faction: Ebonheart Pact
Server: EU Megaserver