A classic lens, but there are many fine alternatives at better prices as mentioned above.
Also, as noted, the lens cosmetics may be look good, but bright light examination will often reveal significant coating marks that coalesce and to produce flare, reduced contrast, and hazy images. The remedy is to polish and re-coat the the front, and less often, the rear glass elements.
Be prepared to spend $250-300 to re-coat the front element. I had a rigid summicron polished and re-coated at Focal Point with excellent results. Wait time can be a few months. If I add in the original cost of the lens purchased from an RFF member in the classifieds, the total price was 750 USD. Not bad overall, and it is one of my favorite lenses.