Not at all.. It is a very nice fish but not $400 quality. Knowing what you could get for $400 I'd say NO WAY. You could easily get two 3-4" flowerhorns nicer than that one online for $150-200 each.
From what I see the fish is nice brother and about the pricing I didn't have any comment since for me sumtimes in hobby there's no standard price all is decided by quality and the reputation of the seller also important thing. Thanks and GBU