You are asking wrong question. Salary range is what they can offer, but you should know your own value. If you think your time is worth $400k then ask $400k. I

You are asking wrong question. Salary range is what they can offer, but you should know your own value. If you think your time is worth $400k then ask $400k. It is simple as that. At one point you should know what amount of money would drive you to get out of bed and do whatever client wants.