I have 2 examples of a Blue Sky. One is a Garand, and the other is a carbine.
Yes, they are definitely well worn. The Garand had to have the clip latch replaced to make it reliable. Both of them needed new springs.
There is still some life left in both barrels, as both of them shoot reasonably well. At some point, which I expect will be in my lifetime, they will both need to be re-barrelled. I have gotten a couple of thousand rounds of fun out of both of them so far, though.
While I think they should be priced at a discount, I would not turn down a Blue Sky stamped gun. They can be re-barrelled rather easily, and most of the other parts that would be needed to bring them back up to snuff are also readily available.
Collectors might sneer at my Blue Sky's, but I consider them to be shooters. At today's prices, my return on investment has been considerable. Remember, they are more popular today than ever before, and they are simply not making them any more.