I am also looking at this f3.3-4.5 lens to match with my FX cam. One was available recently on B&S but I was too late. Just got back from Cam X at Peninsula. They have 2 units in 10 conditions (with some dust inside) for sale at $480 each. Shop next door also has one for sale at $520. If you like can check these out. I wanted to get it but decided to wait out as I have one too many lens that need clearing out first This should be the better lens of the two.