Originally posted by valimyr I managed to snag a 77mm Limited off of Amazon for $67 in good condition.Is there anything else I should look for that something fishy is going on or did I just get insanely lucky? The vendor sells a lot of other cameras and lenses but they are all selling for the average used prices....
As Adam said, post front, rear, and both sides photos of the lens with the caps off if you want us to look for signs of a counterfeit. But a $900 new lens or $700 used lens would not be counterfeited for $67. It would be probably be in the $350-$500 range.
I also do not believe anyone would bother counterfeiting anything but the most popular lenses made by Canon, Nikon, or Sony. The lens makers that have the tech to do this have for the most part found they can make more money legally, than illegally. So we now have Yongnuo, Samyang, Rokinon, etc.
There are still rogue enterprises with flash units, shoes, watches, eyeglass frames, cell phones, and all sorts of franchised logo wear.
My guess is that the seller was clueless about Pentax and didn't do their research on that lens' value. You got a deal of a lifetime.