hmmm the only way to pay for member pin using runescape gold would be
u make my account member first,
then i buy ur member/non member junk that u want to get rid of (anything, i suppose all the unstrungs like willow/maple long (u) for a certain price... 1-1.5 mil( negotiable)
however this would involve the other party to have to go first... and i highly doubt that will happen or if u have some other ways of trading let me hear them here