Hawk,
I don't know what your type of shooting is, so not sure why that scope is way too much. I usually choose my magnification by how and where I am going to use a cartridge, not necessarily the cartridge. One of my buddies and I recently purchased the Bushnell 3200 10X with the mildot reticle. I like mine for targets and working up/accuracy testing loads. My friend loves his for the same and is even going to try it on coyotes. A fixed 10X has it's place, even if not on that .257. Used scopes usually only bring a small fraction of the value that they may have as shooters, so that often makes 'em keepers in my book. Good shootin' to you!