Well, here's the catch.
You think it's high. And you think 325 would be good.
That's great.
You're not the one selling it.
Say you've got something worth $400 to you, and I offer you $325.....how likely are you to drop 20% off your asking price, just because I don't agree?
Unless he's listed it as OBO, he wants $400 for it. That's what it's worth to him. You could always go elsewhere.