Finding an AR-15 value

[Nytelyte]

I don't know if this is faux pas, but how can I find the value of a rifle?
I'm interested in selling an AR-15, but but I am having trouble finding what its worth. This is not intended to be a sale post, when the time comes I'll create that in the proper area.
Its a bushmaster, stock, pretty low round count. It is going to come with couple accouterments which I will NOT list here (to isolate this from being a "For Sale" post). But I would like help finding the fair market value of the stock rifle, bare bones.

Thank you very much. I sincerely hope I am not breaking any rules here, if so I do apologize.

 

[Nytelyte]

Rifle: (separate post in case this is breaking rules so the whole thread is not deleted).

 

[Nytelyte]

Disregard, I just listed it in our BST area after further research.

 

[ripnbst]

To to arms list and similar gun auction sites and see what they are selling for. Or at least what others are asking. Asking price price doesn't mean that is what it sold for.