I believe there's a small, yet effective, means of improving the market for those of us that want to just buy a small handful of a particular item. Aren't you always frustrated to see that everyone is selling the item you want in large stacks, but all you need is like 1 or 5 of it?
Now, wouldn't it be great if we could select the quantity we want to buy? You know, once you select the cheapest item, a pop up box appears and you can push an up or down arrow to select how many you want, it will calculate your total, then you'd be done. The only reason I even thought of this is because of Phantasy Star Online 2. That's basically how the shop system works in that game.
Let's say you put up 999 grinders (a specific item in that game to help you grind your weapon to increase its stats). If someone only needed 20 or so though, they could access your shop (or in this case, simply find it by typing in the item name), select to buy 20, then complete their transaction. The remaining 979 would stay in the shop for others to buy as well.
Normally, the money you earn through the market board goes straight to your retainer. So, how different would it be to simply sell a portion of the product and have the same thing occur? I believe if we could work something like this into the market board, it would not only help people who are seeking a smaller amount of these items, but it would also help save us some storage/inventory space. I'm sure plenty of us have gotten stacks upon stacks of materia from spiritbonding, but usually only put up a stack of 5 (especially if it's an expensive tier IV) individually rather than altogether.
Well, you're using up 5 slots right there. Wouldn't it be better if we could just stack 5 into one slot to sell and if someone wants to just buy 1 of them, they could and you'd still get the money for that one while the remaining 4 stayed on the market? It's worth considering, I think. Something like this may have already been mentioned before and I wasn't aware of it, but if it hasn't... It would be great if you could make this into a question for Yoshi-P and send it his way, then see what he thinks about it.