Hi, I'm interested in your bedroom set.  Are you negotiable on price at all?
I am negotiable.
Would you take 400 if I come pick it up myself?
$400 is a great deal. But I think it is too low for everything. How about $420?
That sounds good to me.  Let's do $420.  Deal?
I am negotiable.
Sounds great. Thanks for the negotiation.
$400 is a great deal. But I think it is too low for everything. How about $420?