They're incredibly easy to get which is why they are a fraction of the price they were whenever you left. 47m is just about enough to buy the 10k you need, give or take.

If you're looking to farm them yourself, people solo or low man fights such as VD Leviathan all the time. Also people haven't done XP in Abyssea in a several years. Consider XPing in Escha zones (Zi'tah probably being the friendliest to your skill/gear level).