For example, i have 3 arrows but only want to sell 2 of them.
Also, i can only get the merchant to sell me in stacks of 10, so it's hard matching my price with multiples of 10 all the time. I'm guessing if there is a way to break up item's the same rule will be applied to breaking up stacks of the merchan'ts ore so i can match my price easier.
Thanks in advance ;)

To transfer items from a body, container or trading:
use + left/right turn = 1 item per click
use + left/right strafe = 10 items per click
use + left/right turn + shift = 100 items per click

Oooh i totally forgot about the turn keys as i always use the mouse to turn. Thanks a bunch man, really appreciate the quick response.

DANG, so that's how it's done. I spent the whole game trying to figure that out. Quirky is the word for Gothic's interface, for sure.

I'm playing G1 now and have the same problem... anyone know how to split up stacks so you don't have to sell them all at once?

Nevermind... just saw the answer... sorry

I wish I read this earlier. So fast and easy.