If you can find one for a reasonable price jump on it, but don't overlook the other choices, i.e. Lyman Super Target Spot, and the Redfield 3200. I have all three and am yet to determine which I like best. My Unertl is a 1 1/2 " Target 16X, my Lyman is a 20X as is the Redfield. Careful trolling of the auction sites and other shooting sites will offer you plenty of choices, patience is key. The price range is between $ 500 and 1000+ depending on power, and condition of course. The Unertl is for the most part going to be the most expensive all things considered.
Good luck on your search
Brer Rabbit