I found this 2005 Buffalo Nickel and it has discoloration (looks tarnished) only in area with scrape markings. Otherwise very nice coin. My question is would these markings be from a die or more probably post mint?
It's hard to be sure from these photos, because they're a bit blurry; you might try again with the camera a bit further from the coin. Those look like post-mint scrapes. They're on the convex part of the design, which is concave on the die; die scratches would be in the fields, because they're the highest features on the die.
Based on those pics I would have to agree with PMD, I no it's hard when your not a photographer believe me I know from personal experience.LOL Dave