My experience is that Euro Delivery does not come out of the dealer's allocation of M3s, once you mention ED, it comes out of a Theater bugdet so the dealer should have no problem discounting.
I used a local dealer (which I wouldn't recommend unless they have done a dozen or more prior), because you loose a lot of time as the dealer works through the process of learning the process of ED. I would use an experienced dealer next time (even if he is just an internet based dealer - much less hassle).
I got 1000 over invoice with little to no negotiation.
I'm just looking for a little tickle in my trousers...
'11 M3 Coupe /// Hellrot Red
/ Rust Brown Interior / Black Piano Trim