With such a high price statement I think it would be fair if we could get some underlaying evidence. I never have seen such high prices paid on Ebay for these cameras...just history isn't doing much to collectors, with military engravings its a different story.
Normal Grey IIIC's have been over $2,500 for a long time now........the last "kit" set up I saw sell had the 35, 50, 90 and 135 in a super rare Grey Leitz carrying case and all were EX and the 135 maybe pushing EX+ it all sold for a little shy of $4,000.
There hasn't been a decent all original and non busted up Normal Grey IIIC camera sold on ebay in about a year and a half, but ebay is no place to research very rare camera prices, the high end European dealers who successfully sell these cameras and the Westlicht Auction show current values and still with my experience over the years with these cameras 80% of the good stuff
NEVER will be seen anywhere for sale over the internet, it's all privately handled between big collectors.
Just last week a close collector friend of mine bought a Normal 42' Grey IIIC with a Grey paint 135 Hektor for $11,000 from another collector, deals like this happen every week.
This 42' which is at the lower end of the condition grade EX/EX- sold for $2,600 a year and a half ago at Westlicht, the camera would briing about $2,800 or $2,900 now, there's very few Normal Bearing cameras coming out on the market if any and even though they are $500 to $700 less than the same condition "K" Grey they are being bought quickly, while real collectors know they are RARER than the K models in production numbers.
The days of finding cameras like this for under $2,000 are long gone, 6 years ago was the last time I bought a IIIC K Grey for under $2k, most collectors are aware of what the cameras are worth now and the very limited supply and great demand has pushed the prices of even very poor conditiion and shabby looking cameras over $2k.
Tom