Hi! I am interested in your HUmvee for sale
It is an amazing vehicle. I'm a former army reservist and I can vouch for the authenticity of this humvee. 
That's great! I like everything about it. I unfortunately do not have the budget to pay what you are asking. I am thinking in the ballpark of $16k
I understand, that's bit low for how great I think this vehicle is and what I'm willing to part with it for. How about around $19000?
If I am willing to travel to you to pick it up, could we do $17500?
That's lower than I wanted to part with it, but you seem genuine so I will accept that offer.