Buyback option from npc vendor.

[Lilith]

Since patch 1.16 there is a problem when selecting items to sell with the mouse: starting from the second item you sell, clicking any item other than the one that's right after the sold item, will highlight both the item you clicked and the item that is right after the previously sold item. Than you get the window to confirm your sale, which will not be the item you clicked. If you go through it to fast you'll sell something you didn't want to.
The first time I had this, I didn't notice it because I saw the item that I clicked on highlight and thus thought it was ok. I lost a lot of gil because of that ...

I don't know if it is realistic, but wouldn't it be easier to have a system to put a check mark next to every item you want to sell, and selling them all at once with one confirmation window? That way you'd have to check once for mistakes and be much faster selling your stuff. (for goldsmiths for example, to sell all the silver rings after grinding instead of selling them one by one and selling a full stack of silver ores by mistake ...)