Looks like he is selling a van too.
Maybe he is in a pinch, financially.

Monthly bills, unexpected house repairs, who knows?
This is where you swoop in for the kill.
HAVE CASH!!!
Drop a low-ball offer, tell him you have the cash, and drive away happy!

Sometimes it's that easy, not always.
Look around for signs that he is in a pinch. This will help you.
Also, when I go looking at Track/Kick's and Samurais, I pretend like I don't even know what I'm looking at.