Surprising to many, this is often not salary negotiation. In most cases, the person you’re interviewing with has little control over the final salary you’ll get. It’s usually used as a reality check – if you’re hiring a janitor and they expect $80K, you can probably toss the resume right then and there. At the same time, a highly-skilled programmer selling themselves at $30K is also setting off some warning bells. A good answer is usually on target or a bit on the high side, but not really low or insanely high. I’d get an idea of the asking rate for the position before I ever go to the interview, then request about 30% more.