I have a chance to possibly buy a Nikon 16-35mm f/4 for $500. Who has experience with it, and how is the lens? Most places say great, but most are also years old, and there has been some newer stuff, though not a ton in this focal length. Here's the kicker: I'm shooting on a D7200 right now, and have a Sigma 17-50mm f/2.8. I have absolutely no need for this lens. I'm thinking about picking it up for two reasons: I'm pretty sure (read: I have absolutely no idea, but I want to) I will be upgrading to a D750 at some point and I don't have wide-angle FX glass, and I think I could sell it for more than $500 if I change my mind (even back to KEH goes for more). I have not decided between the D500 and D750, but I think I want the increased ISO capability the D750 will give me over the D7200, even though I mostly shoot outdoor sports. That's a whole separate thread I think though lol. But as cheap as this is, I don't know if I can pass it up. The purchase wouldn't break me or anything, but I'd honestly prefer to have the money in my pocket. In your opinion, scoop it up or pass?