arcolungo - If your friend keeps shooting the 1950 Kodiak and it breaks, contact me, I'm looking for a broken aluminum laminated Bear.
The general belief among collectors is that a lot of the aluminum laminated bows broke, seems most accounts are based on second hand statements. Unfortunately, nobody on this forum has been able to produce one for examination.
I personally hate to try to break one just to examine the interior structure of the woven fiberglass layers.
To answer your question about value...
The 1950 Kodiak was advertised in K4 (64") but was also made in 62" and 66". Over 90 percent that I have seen are 64". The 1950 K6 (66") is rare. And, I have only ever seen or heard of the possibility of three 1950 K2 bows in existence, but would not be surprised to hear of others tomorrow.
As far as value of the K4s, most sell for between $100 and $300 depending on condition and how many bidders are going after it. Some have gone higher. I've seen lots of 1950 Kodiaks over the years, but very few have been dead mint with no sign of set in the limbs. Dead mint, no set in the limbs, all original decals and leather would be at the top end of the value. A K2 in that condition could easily be double that amount.