to consider, what you did and the weight or quality of materials you had to use, then they get a better idea of what was actually involved. it no longer sounds like some one-size-fits-all item they can buy off the shelf or d-i-y by themselves.
2. if you're only going to charge him $450 for it because you think it will be "good advertising," then make sure that he knows that he got a "friend's discount." otherwise, everybody he talks to will come to you thinking they're going to get a cheap rate too.
once in a while, a friend will tell me, "hey, if that's what it costs, then that's what 