When i use regular pencil and pen for drawing manga, it looks sloppy and messy. So i'm thinking of buying a G-pen but i heard it pretty rare and expensive. Will it make any difference?
A G-pen is soft and creates great lines but you should use it only for lining your final art piece and not for sketching cos it will be a waste of ink especially if you screw up. But you really dont have to use a G-pen to draw you can buy copic multiliners which are equally useful.
hope that helped :D