1. He never mentioned

1. He never mentioned the exact amount of money he made, even when asked twice.
2. He did say he was in the “mid to high range.”
3. He thinks of a reason (for example, it is difficult to compare salaries in a small company with those of a large company). Other reasons could be the following:

• A change of geographic area (for example, from Seattle to Atlanta)
• A change of level of position (for example, from manager to director)
• A change of industry (for example, from travel to telecommunications)
• A change in the type of pay structure (for example, from commission to hourly wages or a salary)

After he establishes that a comparison can’t be made, he turns the question back on the interviewer by saying, “What salary range do you think would be reasonable for a person with my skills?” Notice he still doesn’t ask for an exact number. An exact number would partially “close the door.” Alex crafts his responses so that the door stays open.

Taken from : Fearless Interviewing - How To Win The Job