Looking at a used Thermion XQ 38 and a Trijicon ML11 ir hunter 35mm. Would be using them for coyotes in Wisconsin. We don't have a lot of distance where we could hunt 3-4 hundred yards would be a long shot. Probably closer to 1-200 yards. And would only get to go once in a while. Any reason not to get them? Problems with used or because of cold weather? Any suggestions would be appreciated.