there is only 1 of this rifle on gunbroker and the guy is asking $1200
Completed auctions. Not ongoing auctions.
A recent, no reserve auction completed with 33 bids at $910 (91XXX serial number). A JM (92XXX serial number) just went for $1136 with 14 bids. Another JM went for $905 with a big Simmons scope and 2 bids. I'd say that's a pretty fair representation of the retail market. Expect about 2/3 of that if you trade it to a dealer.
There are any number of Facebook pages devoted to selling firearms across the state. You might have to drive a little bit, but you'll probably get more than trading it to a dealer.
Of course, there's always the consignment option. Moeller Arms sells firearms on consignment here in Omaha.
Looks like Gunbroker would treat you pretty good, though.