Hi I am very interested in your mattress.  How old is it?
Hello, how are you? It's only 1 year old. We are just travelling for the couple of years and paring down.
I am doing great thanks for asking.  How are you?
Very good as well. So we paid quite a lot more for the mattress. And we think this is a fair price.
So will it be available today or do I have to wait until your actual move date to pick it up?
We've got to get used to not having a mattress so if you need it today that's totally okay. 
Ok well our house just burnt down the other day and we have to replace everything.  Would you possibly take $150 for it?
Wow. So sorry. Yes that's okay. Please come by and pick it up 150 is good.