Not sure if this has been brought up already, but I would really like to see the option to select a quantity for an item I want to send when attaching that item to a letter.
I agree this is desperately needed - frustrating if I want to send 'one' flaming humbaba. not the 'three' flaming humbabas I have listed in one slot.
I've found the only way round this is to drop the items in questions and pick up one and put it in one slot, then drag the remainder to a different slot. very cumbersome and something I'm not keen on doing in busy areas.
+1 to being able to select a quantity for an item instead of all or nothing
+1 for being able to send multiple items. I am fine if it is more expensive even! The frog seems plenty strong to carry the extra weight.