Here's some advice: The word "fair" stopped making sense in kindergarten. You don't get what's fair or what you deserve, you get what you negotiate. Now, having said that, you have to determine your goals and how to synthesize an ideal set of negotiating levels. Typically these levels are: 1. Possible Best Case 2. Likely negotiated agreement 3. Worse you'll take (walk away below) 4. BATNA - Your "Best Alternative to…
edit: I had a total brain malfunction as pointed out below. Do not be candid, use skepticism and protect your private information.