Well, it turns out that, at least according to the buyer/collector that I showed it too, there are a couple of issues with it. Someone etched Norinco on the cover

which could be corrected by getting a clean Chinese cover. (The correct import marks on on the barrel under they bayonet.)
AND
The stock was refinished, which he told me, drops the value by at least $200.
Further he said that the stock cracking by having been shot is a myth and the it had been obviously already fired and has no ill effects showing.
He examined it at said that if the stock was going to fail, it would have already done so.
I'm still going to try and sell it but if I can't find a decent trade I will shave out the Tapco stock that I have and see if that will work.