Hello, how are you?
Hi I am great!  I would like to offer $55 for the Camcorder
Only $55?  Does it not have all the features you want?
Since it is just a bit better than my standard phone I don't know if I would actually use it to justify paying the full asking price. 
Ah but it comes in mint condition still wrapped inside the box.  Surely you can do $100
Since it is in mint condition I could do $70 if that is possible for you.  I could pay cash today and pick up in a few hour.
Well... if you can pick it up today and pay in cash... $75?
that sounds fair. I will do $75!