You cannot list the price of these items or when they will be available. The price varies on how many are purchased, and they only have the items that players have sold to them. So if someone sells three Grass Thread to them, then they have three grass threads, no more, no less, and once they sell three grass threads, they don't have any more to sell to people until someone sells them more. And the more it is purchased and the less there are, the higher the price will be.
In short, prices change with the stock, stock is changed by the player selling to them. Conquest Ranking and Fame play no part in these 'PC' run shops.
Wrong, the guild stocks up on basic synthesis materials on a daily basis, the price of these materials is based completely on the stock of the item at the end of the previous day. Anything but the basic synthesis materials have to be sold to the guild merchants before becoming purchaseable by players.
That list was made before the update where the prices were set by the stocks... it is written ''Last update: Fri Apr 9 18:39:18 2004''... So, yeah it should be updated but I think that they should add the new stuffs and not modify all those little problems... Time is a problem I think!... and let them play also... lol
Apparently, from what I've noticed, Guild Shops only have things in stock depending on what players turn in for points or sell to them. This is perhaps why so many people complain about why these NPCs aren't selling certain things or such. I believe this was part of an update that SE put in a while back, to try to prevent players from buying things at the Guild Shop and selling them on AH... at least, to try as best as possible.