In Real Good shape , the 270 Long Action Model 7400 is worth $250 too $350 less the scope .
$ 26
According to Remington's website, that model was made 1928-1933.
There is no Remington Model 6 pistol, there has been however cases however of Remington Model 6 rifles converted to pistols by gun or "home" smiths. NOT Remington. As such the value is whatever someone will pay, but generally not much.
your Remington model 6 was made in 1998,due to the S prefix on the serial#.
Most sell for $750 and up on auctions.
It is unusual vs. rare
the 740 is a very old model, they sell for $250- $350 in this area
http://remingtonsociety.com/rsa/service
1919
CHeck the receiver and barrel
1928, will be date code stamped. check link on Remington Society.
A Remington Model 760C in 95% condition would sell for around $375.00