Antique Nato Military OTF Autoknife(camo handle)

I got this knife when my grandpa died. I found it in his clothing drawer and was wondering how much it is worth. I've looked around and what I could find is that it's definitely an antique that is supposedly a little hard to find. The front end at the top of the handle broke off where the blade flew out and ripped it off. I have since then repaired it but I'm sure that would bring the price down. Thank you.

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