I am in a quandry; whick would be a better step up from my D200? A very lightly used and pristine D3s, or a new D4. Yes I understand the price difference; approx. $1900. But I am amazed at the asking price for what is termed a NEW D3s shown on Ebay ($7,000). I have a AF-S 17-35 f2.8; a AF-S 28-70 f2.8; a 80-200 f2.8D; and a IF-ED 300 f4.0. All good camera front ends.