Depends where you are working in the world. If in the u.k. don't take less than about £30,000 - £42,000 all into start with. If they can afford NG then can afford to pay you this as a starter.
Some low cost carriers insult pilots by offering as low as someone working in McDonalds. Give these carriers a miss. You can do better than this.
Draw your line in the sand and stick to it . It will pay you dividends in the long run.