I've got about a half dozen coping saws (6½" pin end blade), and to tell ya the truth, from the most expensive to the cheapest there's not much of a difference. The difference to me is how they feel in your hand. Some handles to me feel skinny, maybe because I have big hands. But the shape and size of the handle to me is important. I like saws that have tension adjustment at both ends. I think even the cheap ones have that.
While you're lookin' at coping saws, consider a fret saw for your toolbox. There may be times when you will need the depth. Coping saws aren't that expensive, somewhere around $20 or less.
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