What is this knife worth?

[Stacynlori]

I have a Schrade knife that I found in my fathers belongings, and was looking for some info. It says National Park Service75th anniversary. 1916-1991. A carved picture of a buffalo on the range on the handle. Blade bottom says Schrade USA 515 sc. Any info would be great!

 

[digdeep]

Best to check an auction website like fleabay. Please read forum rules. Good luck!

 

[Esav Benyamin]

Many knives can be extremely difficult to identify without a picture.
You can download to a photo host like Photobucket then copy the URL and paste it in here.