I'm upgrading from my Nikon D300 to the D700 but I don't know how low I should go on my D300. I bought my D300 18 months ago brand new for 2,000. I have shot 4 weddings with it and took it on a two week trip to Brazil and the rest of the time it's sat in my camera bag doing nothing. I have estimated 10,000 actuations. It looks nearly brand new--it is in excellent condition. The only tiny blemishes are on the bottom of the camera body where my battery grip attaches. I have all of the original boxes and packaging. It comes with the Nikkor 18-135mm lens. No warranty. Any thoughts?