Pimp'in Ain't Easy...
Try farming Abyssea items that are high in demand:
http://www.ffxiah.com/item/2641/amoeban-pseudopod
http://www.ffxiah.com/item/2889/limule-pincer
http://www.ffxiah.com/item/2640/murex-spicule
you could also try harvesting Lesser Chigroes (/DNC recommended for snk/inv... NIN tools are too expensive and Sneak/Invis spells take to long to cast and are unreliable)...
http://wiki.ffxiclopedia.org/wiki/Lesser_Chigoe
http://wiki.ffxiclopedia.org/wiki/Grauberg_(S)