Bob's Watches, which I heard is a reputable online Rolex guy, has a boxes and papers 5513 Sub for $5,300. Seems a little low so it may have been polished or something but it looks fantastic. Has a nice creamy color to the hands and markers and the hands haven't corroded which happens sometimes.
I saw that! That 5513 looked really tasty. There are some pretty decent deals out there for some of the less uncommon (but still beautiful) models.