The N system prices are about as low as I have seen and they are staying there - atleast for the last 8 months I have been tracking them. I have been hunting these down for myself and here's what I have seen....
N1 Body - Like new minty condition - $500 - saw these as high as $1200 for a brand new body
NX Body - new in box: $245 - as high as $500
D10 Dateback for N1: $225 was the lowest I could find for brand new specimen - $399 was the highest
28-80mm f3.5-5.6 with hood - $225 for new with warranty, $209 for used in EX+ condition
24-85mm f3.5-4.5: Varies if with hood or without and based on condition: $450 - $780. Found a couple new lenses with box/warranty for $1090
70-300f4-5.6: Anywhere from $625-$825 depending on condition
50mm f1.4: $308 for used - $540 for new - up to $939 for brand new
85mm f1.4: $800 for a mint condition lens - $1250 for like new lens with box/paperwork and up to $1600 for new
17-35mm f2.8: $1085 for a minty condition lens ( I missed out on that one) - up to $2300 for new in box
NAM-1 Adapter: $249 - $395
70-200mm f3.5-4.5: $285 for EX+ condition lens - $575 for brand new
FE-1 LCD Viewfinder: $350-$475. I found one for $400 in like new with box and paperwork. The batteries that come with it were still sealed and a sticker was still on the LCD implying it was never used
P9 Grip: $190 for a used grip - up to $399 for new
TLA-360: $225 - $375. and as high as $499. I actually came across a brand new flash with box/papers/warranty for $300
The hoods have been selling for anywhere from $45 - $449 depending on how difficult it is to find one.
Original lens caps are going for as low as $5 and the lens pouches are selling for around $25-$45 used (but in good condition).
I also found a couple of deals on the 645 lenses:
140mm f2.8: $850-$900 for new
80mm f2.0: $325 for used and as low as $450 for new
Contax might be a name for the history books until Kyocera decides what it wants to do with it's license. However, Zeiss, Germany is still providing service for N mount lenses and Contax bodies are still available under warranty. Buying a film body from contax might still be worthwhile right now (as long as film and processing labs are still available) - as we all know, those N mount lenses are a peach to use and the results are about as good as one can expect from a truly amazing system using zeiss optics. I still have 5 N mount lenses and 2 645 lenses I use with the NAM adapter.
My main setup is Canon Digital including two 1-series full frame digital bodies and a bunch of primes and zooms. However, I still shoot film and my Contax N setup is what I rely on for amazing results. My Contax T still gets a roll atleast once a month. As long as film is available, I will be shooting film for sure
Hope this helps.