Final Fantasy IX: 60,000 Gil in 7 minutes

This is a demo of the Cotton Robe "trick" that I've used to make most of my money in my low level game, but it can help in a normal game as well.
Each time you synth 99 Cotton Robes, you make 60000 gil. Prior to getting the Blue Narciss, it can be done easily 3 times, once per disc:

Disc 1: Buy Wrists in Dali, Buy Steepled Hats in Lindblum, Synth in Lindblum

Disc 2:Buy Steepled Hats in Burmecia at the end of Disc 1, Buy Wrists in Dali on the way to Treno, Synth in Treno

Disc 3: Buy Steepled Hats in the Black Mage Village on Disc 2, buy Wrists while getting the Burman Coffee during the Card Tournament, Synth in Treno