I got it for $16 from Revain with lots Mounting adapters stolen. I have had many of these finders, this one is as good as anything I have used including TelRad. Replaceable battery, dimmable laser dot, alt/az adjustment screws for easy alignment. To be fair the TelRad has a cool crosshair projected onto the scope, this one just has a red dot but the end result is the same. Much better than the cheap standard 6x finder on a non-level mount. Nothing more to say, buy it instead of the more expensive TelRad, Orion and Celestron Unity (0 Zoom) viewfinders for a lot more money. For the fools asking stupid questions here instead of doing even the most basic research if you don't understand what the search for unity is, there is a new intelligent service called "Search Engine". Type "telescope unity finder" and actually LEARN what this product does before complaining that you are too stupid to install and use this very simple and reliable product. hahahaha
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