Has anybody actually ever wanted to buy 999 of an item? Or to turn their entire Ur-ly wealth into meat collectors?
It seems to me that the "max" button on the vendor buy dialog is only ever used by mistake. Maybe it could be re-purposed for something else? The thing I'd love to see would be a stack-size button... pressing it would set the quantity to however many of an item fit in a backpack slot. For items that only fit one-per-slot maybe it could do something else (or disappear from the dialog for those items)?