I'm looking for a FF camera to use mainly for landscapes. I would like to pair it with a 16-35 lens or similar. With a view to possibly selling it in future as I have a Canon body elsewhere that I don't have access to. I have some Canon glass that I don't have access to for a while so that might come into the equation on the body type if I decided to keep it. A new 5DS is going for $1700 at the moment but I'm concerned about the dynamic range, the lack of high ISO and the fixed Live View screen. I'm also concerned it will be difficult to sell in the future. I'm considering an A7RII second hand or possibly an A7III new. I have heard A7RII is a bit less polished. The A7III is the good allrounder with great AF albeit with less resolution. How does the A7RII AF compare to the A7III? Are there any other bodies you would consider and please advise why. Is there any of the 3 that you wouldn't buy? What is the going rate for a reasonable used A7RII, A7III and 5DS or 5DSR?