I think my area has lots of those kind of pens =\ I bought a few last time for fun and collection... But I think the entire set costs about US$65...(I converted from my currency) So I just bought... 4 colours >_< and ... 4 of them costs like US$10... I think...
Eh... as for Gosho markers, do think it is this one...
Graphite? Are all pencils useable? Or only some of them? Does graphite mean carbon? Erm... what kind of graphite do I need to use? Did you do your shadings with just one type of pencil? Like 2B or 6B or??? Did you use an ink pen to do the outline???
>_< Ops... too many... questions XD Sorry...