Anytime I was asked that durring an intervue I always say some huge number like $500/hr.

them: and what would you like to be paid?
me: Like or expect... cause I'd like $500/hr.
them: hehe well don't we all. Let me rephrase it...
me: no I understand, I'm just joking around. If course I would LIKE it... but I would probably expect something along the lines of $XXXXX/hr/year/day/week/whatever