I could really not care if a Noctilux went for $16000 as it would not be my $16000 spent on it! This is a 40+ year old design, which was a sensation when it came out - today it is old hat and technology! My only problem is that it twists the "value" of Leica's other offerings.
Leica does not make anything on used lenses (except the odd repair or service) and most of the Leica lenses sold are just that - used, 2nd hand or even 5-6th hand! To stay in business they need to sell the new stuff and at the moment they have competition, something they have not been used too for decades. The run of the mill lenses, 21,24,35,50 and 90's are available from other manufacturers at 1/3 to 1/4 of their prices! You can talk about day-rates and that, but today there are only a handful of shooters who ask and get the $5000/day jobs and most likely they use DSL's or Digital MF for the file sizes the client requires.
I used to shoot commercially for years and, yes, occasionally you had to buy or rent specific lenses that were designed to solve yours and the clients problems. Nikkor 8mm f2.8 fish eye, Hasselblads Super Achromat 250's, 100f3.5 Planar etc.If you bought it you had to calculate how many jobs were needed to pay it off. If you rented it, you just charged the client.
A $16000 50mm lens would not "compute". Modern film and digital sensors would make it possible to use a "mundane" 50mm f1.4 Asph or even a 50mm f1.5 C-Sonnar/50f1.5 Nokton. The client would not be any wiser, if you knew how to use either of these lenses. Clients really dont care what you are using - they want results, on time and within budget!
If someone wants to buy a $16000 Noctlux, good for the dealer and Leica. They both make money for them and thats needed to stay in business. Now, what happens to the value of these lenses if and when someone comes out with a 0.85/50mm at Photokina? Maybe Leica will have one for their "show and tell" - watch values drop through the floor!