What I've seen is that usually, if a company is negotiating in good faith with you, they'll give you an offer that is close to as good as they can make it. Nor

What I've seen is that usually, if a company is negotiating in good faith with you, they'll give you an offer that is close to as good as they can make it. Normally you can't get very much more in terms of more vacation, a higher signing bonus, or a higher % for bonus, unless you're a superstar and then the rules are different. Of course, negotiating for a higher position than what they were considering, and with that the commensurate salary, etc, is totally valid. If they don't give you the best offer they can, it would make me question whether or not they're a good company to start with. Someone who is trying to squeeze out as much from their new employee as possible doesn't seem to be a company that values keeping their employees happy.