I think "how you do it" matters a lot in this case a lot and context/relationship/the particular requirement all play a big role. Basically you are not just cas

I think "how you do it" matters a lot in this case a lot and context/relationship/the particular requirement all play a big role. Basically you are not just casually saying "pay me whatever you like". The customer already trusts you, values your skill/offerings, knows she wants to get the task done from you, and understands that it may be tough to price so a more flexible approach is good to ensure no time is wasted in coming up with a price.