What will you be using it for?
If its only a recreational gun you could get a lower from rockmud here in the forum and get an upper from http://www.jsesurplus.com/custom16hb...tandard-2.aspx
and have a complete gun new for a very affordable price.
Home defense and a little range shooting. I want to buy new.
If you want something new, the spike's is nice. They are 799 retail and there are coupons for $50 off or 5% off floating around the net.