Some nice, small additions:
1) If you're on mercant/vendor page, then on double-clicking item in your inventory it moves to "sell slot". Now we have to always drag-n-drop and that's kind of hard to do when you're repacking 100 or even more items.
2) If you're on mercant/vendor page, then it would be nice to have some "switch" (checkbox or something) which is stored in session and if checked, then automatically change sell price to 1 gold (that's to ease repacking of items).
Customer support service by UserEcho