If you can't remove the carry handle, and it isn't a National Match version, I wouldn't pay that much for it.
My brother has one with the removable carry handle and he is going to sell it for $800. It only has a couple 100 rounds through it, if that.
If you look at the link I provided to Bud's, they are selling the A2 fixed carry handle model for $927. So you would only be saving $75 off a new one. I wouldn't pay more than $785 for it myself. (85% of a new gun from Buds)
And honestly, I wouldn't want it unless the carry handle was removable as it really limits your ability to add optics to it later.
But it is your money and you have actually seen the gun.
I am no longer participating in gun forums.