Coming pack to post some answers/thoughts in this thread since I've found out a few from being an active vendor now for a short while. I stand by my previous statement that any function that is verified not to exist should exist for that specific function. :PA) There doesn't appear to be any way of sharing a quantity listing. When a listing is depleted of its quantity it gets automatically removed from view and returns the error message "This item is not currently listed" - it's still viewable however with the "Listed items" option for the vendor by title and will instantly re-appear again if one edits the quantity to anything else than zero.B) While I haven't experimented anything with this my understanding of it so far is you add one postage option per product, regardless of quantity. In other words, if there are three different products and three different postage options you could end up with all three options theoretically. Unfortunately there is no automatic system for this, so as I suspected the vendors have to create systems and explain them to the customers, who could technically at any time pick the wrong option and end up with higher fees than they should have according to the rules.C) There is no way of doing this as far as I can see unfortunately, the options are to contact the buyer to make some kind of deal or cancelling the order. Creating rules for a product will make no difference if someone decided to simply not read and order anyway.D) I'm no closer to this answer.E) There doesn't appear to be any option like this, and this in combination with the answer to A) where listings get removed from view is not very effective to be honest. You will never know if the quantity is permanently depleted or if the vendor is simply waiting for example a day more for additional product. One could technically add a quantity of 1 and set a temporarily absurd high price so no one orders by mistake to keep the listing up but this is a very low tech solution.F) Not at all familiar with the Finalize Early concept, although I'm getting a bit worried about a few orders which have been in transit several days now where I have no indication as of yet that there's trouble from the customer - so I see why some might find use of this.G) There actually appears to be some kind of system for this, it can be accessed through the option Gift codes. It is also possible to create stealth listings where the specific listing is only accessible by entering the correct URL - it won't be viewable by browsing through the listings manually.For some other random information which didn't relate to the questions listed which I find noteworthy:* Listings which get removed from view when they reach zero in quantity retain all their feedback, but you can't see them through the product link itself until the quantity is set above zero.* Images appear to have a maximum dimension of 400x300 pixels, you can only have one per listing.* A listing can't change names after it's up, one will have to put up a new listing if another name is wanted.* Usually when one puts up a listing for domestic use only it will get put up on Silk Road itself instantly, but will usually take 10-20 minutes until it appears in the domestic only section - I have no idea why this is the case but can be worth keeping in mind if one gets worried when it doesn't appear instantly after putting a listing up and checking the domestic section.Might help someone, I'm mostly posting as I get a better memory on how things work when I write about it. :)