For C$350, you probably got a good deal. The small scratches and speck (depending on its size) will increase the level of flare on the 85, so you'll need to be careful about using the right lens hood, but the lens should still give you good performance and is worth the money by itself. The "big nasty" in the 50 could have a worse effect, and may also indicate mechanical problems--but in the long run the best thing to do is to shoot several rolls of film with both and see how they enlarge. Chances are, though, that both will give you good images. Best, Richard