I would expect this gun on the open gun market to sell for at least $3-4k if not more.
I would say start it at $2k and hope you have a couple gun nuts in the crowd.

Mr. Mitchell: Thanks so much for sharing such a wonderful Parker with us. This is one of the Parkers in my dreams. I will be at the auction for sure. Will mortgage my house and bring a wheelbarrow full of money to pay for it. Hopefully, I will not have to spend all of it.:crying: Regards, Bob

Mr. Hardison: Hope to see you there! We certainly hope someone that appreciates the gun will be the one to take it home, and you sound as if you would. Good luck on the bidding. Thanks!

Good Morning Mr. Mitchell: You will have at least one gun nut (me) as Mr. Dudley affectionately calls us. My problem is I'm also a nut about watches, clocks and a a lot of other things I can't afford. Look forward to meeting you. Regards, Bob