[opendomain]

I have seen this quite a lot recently. I believe the premise is that you may be emotionally exhausted after the interviews and may be willing to take less. Here is the real question for you: is this offer close to something that you are earning now or some other reason their offer was so low? If not, my suggestion would be to say no. Even IF you were to negotiate, in my experience a company that begins a relationship with you like this will only continue to view you as a commodity rather than a person.