I know some one that has a Brace of 1000 that they are thinking of selling , he might be willing to split them up IF you're interested in spending that kind of money
here's a link to info about them
I've got one. Not sure of the date. Sn N550x. Its in 95%+ condition. Correct front sight, Also have the original side saddle mount scope for it. I have no idea what its worth, but would consider selling for a fair price.