Most of you are missing the point. The OP has 8k gil. He is wondering where new gil comes from, not how to make money from other people.

So far we've got

1. Quests - Once you run out then what?
2. Dungeons - Repair cost is higher
3. Fates - Repair cost is higher
4. Leves - Repair cost is higher
5. Mob drops - Vendor sell price does not cover repair cost
6. Make new characters to refarm Quests??????