I did not, unfortunately. I will try and find a picture on the web that shows it. You can see a nice large chunk of the cold, hard metal peeking out from in between the B-Pillar and door panel. Very unrefined, in an otherwise superb interior and fit and finish.
		
		
	 
Here, I'll help get you started. Red exterior on a white interior should stand out like a fresh gunshot wound:
Yet I'm not seeing it. Perhaps it's a crapload less obvious than you're trying to make it out to be. You had already made up your mind months ago that the 6GC was overpriced; what made you think it would be any different when the dealer orders one optioned up?
 
 
The point about 2nd hand market is next to useless. It might merely tell us that there are a lot of cars to go around for 2nd hand buyers who are obviously not well off enough to have comfortably purchased new to begin with. This may be an oversupply issue for the 2nd hand market, not an indicator of original list prices being wrong. If we make a correlation between the 2nd hand market and MSRPs (and conveniently ignore the very important role that volume plays in this), we'd have to conclude that Ferrari underpriced the Enzo by $400k. We'd have to conclude that a few short years after the CGT was introduced, Porsche overpriced that car by many 10's of thousands of dollars; nowadays in various parts of the world, we'd have to conclude that Porsche got the MSRP all wrong and should have priced it higher, as the car has appreciated beyond MSRP in some markets.
The reality is that the MSRP is a function of long-term purchasing contracts, locked in between manufacturers and their suppliers years in advance, based primarily on the planned volume. Which is why in bad times, you don't see manufacturers lowering their MSRPs; some have actually increased in price like the GT-R. Whatever profit schemes the manufacturers have, they will enjoy/suffer them as they've already got their profit from selling to the dealer ("invoice"); or they will take the hit in lower volumes and "learn from their mistake" the next time around.  Considering BMW is following the same pricing scheme as the last 6er, we can conclude there was no mistake to begin with. 
It is up to the dealers, who are independent entities from the manufacturers to make whatever deals are necessary for in-stock items. Many of these premium-marque cars are ordered to customer specifications, so there is little to no wiggle room for negotiating.
 
And yeah, MB's are discounted too.
http://mbworld.org/forums/cls-coupe-c218/431191-cls550-4matic-discounts-off-msrp.html
http://mbworld.org/forums/general-mercedes-discussion/394847-discount-bmw-owners.html
http://mbworld.org/forums/c63-amg-w204/405837-left-over-2011s-dealers.html
http://mbworld.org/forums/4995305-post86.html
(Interestingly, the member "K-A" on that forum seems to support my view about purchasing decisions often being based on emotional, not purely rational, factors. Quite a different view from the "K-A" posting within this thread.)