The employers BATNA is they go to the pool of 35 other candidates. Yours is you go back to your job.
If your job hunting first when your sick to death of your job, your BATNA isn’t very strong.
If this is your only offer, your BATNA isn’t very strong.
If you’re one paycheck away from being out of the street, your BATNA isn’t very strong.
See where I’m going with this?