I found this interesting:
The Springfield Armory M1 on the right I bought in ether 2009, or 2010 through Southern Ohio Gun, and other than a quick cleaning, and replacing the oil infested stock, it went to the gun safe.
Finally in December I got it out to fire it, and found what I thought was cosmoline in the chamber, after some industrial style cleaning it turned out to be a broken casing, and after a few hours with my local smith, we found the case was so corroded in place,it was not coming out, and the top of the barrel under the hand-guards was heavily pitted, he said I could re-barrel it but he was somewhat suspect that some of the other parts might inhibit it functioning correctly, and suggested I ether use it for a wall hanger or part it out.
The Springfield Armory M1 on the left, I bought from an individual at the last gun show I attended, he told me it was a CMP gun, and it is indeed clean, the bore is shiny there is no pitting, and it functions well.
But what is interesting is they are less than 1000 apart in serial numbers, and the one on the right is the newer of the two.