Without having any personal experience with any of those mentioned I'd probably steer him toward a new bow, especially if it's cheaper. The fact that he'd have to set it up is relatively unimportant. The accessories might be on the used ones, but he'd probably still have to move things around and retune them for his shooting style.

As for any A2A difference? Being a new shooter I'd steer him toward something a little longer and/or a higher brace height. Something with a little more forgiveness. I know everybody these days think shorter is better from a treestand, but frankly a couple inches isn't going to make that much difference.