I'm hoping to get some firewood, would you be willing to give me two packages?
I was hoping to get more firewood, I needed more firewood than other things.
Let's try this. What do you need least?
I need food the least. 🙂 
Would you be willing to give me two packages of food?
Yes, I am willing to give you two packages of food. 
Ok, I don't really need much water. What do you suggest we do about that?
I actually needed more water because of my kidney issues. 
I would be willing to give you two packages of water
That sounds good, thank you for giving more packages of water. I really need them. 🙂 
Ok, now what would you consider to be reasonable for firewood
I was hoping to get two packages of firewood to have for emergencies. 
The thing is, my elderly mum is with us and she would do much better in the evenings with the warmth
If you give me 3 packages of water I am willing to give you 2 packages of firewood. 
deal!
Okay, thank you.