Your Browning A-bolt medallion,which was made in the year 1991 will bring between 375-550 dollars,depending on overall condition of the rifle and a good bore.
For a new in the box Browning A-bolt II medallion,the price is 805 dollars in the caliber .270Win short Mag.
I just purchased (Dec 08) a used Browning A-Bolt Medallion with composite stock, BOSS, Browning fitted hard case and Tasco 3-24X scope, all in 98% condition, for $600.
At least 500 dollars for one in the condition that you describe.
Without more specific information; 100-1000 USD
a good rifle
500-700 USD or so
A bolt action rifle chambered for 25/06
your 1989 made browning medallion is going for between 265-600 dollars depending on the overall condition of the wood and metal.
To tell if you have a Browning Gold Medallion 7 mm mag, you can compare this rifle to the Browning rifles pictures on websites like GunsAmerica. Make sure you have a bolt action rifle with a Browning markings on the buttstock and on the bolt.