I 100% agree with ForteNightshade.
In the end it is bots that profit and would even encourage to bot more because it will be much easier to get their botted stuff out. While people who try to work their way around the MB will be in a disadvantage.
The reason we don't sell in smaller stacks is the limit of items we can sell at a time. I would love to offer you 1 / 2 / 4 / 8 / 10 stacks of an item. But it eats up a lot of retainer slot that I could use to sell other stuff as well.
And if you - as a buyer - are not willing to pay the price for my 99x stack (although I rarely sell 99x stacks), then neither you or I make anything out of it. So there is no winner.
When you say: "If there are only 99x stacks listed then I go and farm it myself." - Please do so. Because I went out there. And farmed it at some point. And now I'm selling it. I put in time to get these items - and now I want to get gil for the time I spent working for the ones who are hopefully buying from me.
And I want to sell it to my conditions. And not put it in a pull with a bunch of bots and a bunch of others and wait if or if not my stuff or the bot stuff get sold first.
And honestly - at the moment most items are dirt cheap - especially from crafting. Heck, I haven't touched any crafted gear after the first week of 5.05 because the Prices crashed so fast that it is nearly impossible to pull even a decent reward for the time it takes to craft them.