The fact that you mentioned it has "two magazine going with it" indicates to me that it's a Model 99C rather than a Model 99 with the rotary magazine.
While it's a decent hunting rifle, it's not worth $425 even WITH that Redfield scope on it. It is a newer model made after Savage's move from Chicopee Fall, MA to Westfield, MA. Therefore, no collector is interested in it and it must stand alone as a "hunter", not a "collector".
Generally, the Model 99s made after Savage's move to Westfield in 1960 are not considered nearly the quality of the Model 99s made prior to 1960. Therefore, the price reflects that lesser quality. However, some people are not all that familiar with the history and changes in quality of the Savage Model 99s and think if it's a Model 99, it's worth a lot.
As a "Rule of Thumb", Model 99s made PRIOR to 1960 will have serial numbers BELOW 1 million (1,000,000) and
NO LETTER PREFIX... I.E., "A236xxx" or "B123xxx in front of the serial number. The lower numbered Model 99s (with serial#'s below one million) made in the 1930s, 1940s and 1950s are the "valuable" Model 99s due to their extremely high quality, full features and that famous "rotary magazine" which means you can use regular pointed ("spitzer") bullets in a lever-action rifle.
I'd offer $325 and be willing to go up to $375 "out-the-door" meaning "including sales tax and everything". That means you'd be paying about $350 + tax for the rifle & scope... a decent deal, especially if you get the pawn shop owner to "throw in" a decent hard-shell rifle case. He's got a basement full of them that didn't cost him anything because they came into him with pawned rifles & shotguns in them and the pawn shop paid
NOTHING for the cases that came with the guns they pawned and, eventually, the gun-owners forfeited because they didn't pay the interest and storage plus the amount loaned on the guns.
A "sweet deal" would be $300 "out-the-door"... especially when you realize the pawn shop doesn't have more than $75 to $100 in the gun & scope. But the pawn shop owner might think he has a "gem" because it's a Model 99... and pawn shop owners aren't stupid. But sometimes, they are not as sharp about centain "markets" as experts are... like right now... and this "market".
Personally, I would
NOT pay more that $300 for it "out-the-door", but then... I already own a "minty" 98%, 1953 Model 99 (an "EG" with the rotary magazine) in .300 Savage caliber... that I use as my "deer rifle" in Pennsylvania each Autumn.
Go "wave" three $100 dollar bills under the pawn shop (ONLY the) OWNER'S nose... and tell him "This is all the money I have to spend on the rifle"... and you might buy it for that money, but don't bother asking for the "hard shell case"... 'cause you've just bought the rifle for the pawn shop owner's low-ball price.
After all, nothing ventured, nothing gained. Right?

Strength & Honor...
Ron T.