Noct is huge and very special in terms of the creamy bokeh. Paying f/1.0 for the center while the corners are f/2.0 is actually very $$$ . I have seen the 75 Lux and the 35 (pre-ASPH), all considered legends and king of bokeh. Is your 28 Elmarit ASPH?
Nope, it's the 3rd Generation one or known as type 3, the one with the screw in lenshood. But then, the Noct is the one which will appreciate in price over time... used to be around $4K now....almost $9K brand new! Moreover, I think that they have stop production of the Noct somehow...like the 75 Lux.