You might could score a deal on a used nightforce, but you risk not getting FFP. As others have said, it would be best to keep saving for a better scope. Or you could look at a Burris XTR.
http://swfa.com/Burris-5-25x50-XTR-I...pe-P79831.aspx

You could also look at the Luepolds, possibly find a used one.