12 Wind Crystals at AH = 1200 gil
12 Fire Crystals at AH = 2200+ gil
12 Bat Wings at AH = 2200+ gil
12 Sulfur at AH = 6000+ gil

All soem good items to shoot for. Just gotta learn what monsters drop what and then go hunt them for the items till you get the stacks, sell em, and then you'll be making money in no time.

Incidently if your in Windurst, fight crawler type monsters till you get 12 silk threads, those sell for 10,000+ at the AH usually.