A few hundred to a few thousand depending on EXACTLY what you have
Your winchester model 70 chambered in .308 Win.is a short action.
Winchester model 100 (rifle) in 100% shape is worth $550.00 in the 308 caliber. Winchester model 100 (carbine) in 100% shape is worth $795.00 in 308 caliber. If you find a model 100 in the 284 caliber consider yourself lucky and buy it, dinosaur bones are easier to find.
The numbers .308 are the caliber of your rifle,not the model number.Please include the model number and serial number to get the age of your Winchester rifle.
your winchester model 100 semi-auto rifle was made by winchester in 1962.
your model 100 Winchester was made in 1966,the value will depend on many condition issues but they generally run from 450.00 to 550.00.dollars.
your Winchester model 100 semi-auto was made in 1965.
100-400 USD
With the serial number that you have provided,your Winchester model 70 rifle in .308 caliber was made in the first part of the year 1982.
Your winchester model 100 semi-auto rifle which was made in the year 1965 will bring between 350-500 dollars in the condition that you describe.
With the serial number that you have supplied,your Winchester model 100 semi-auto rifle in .308 was made in the year 1961,which was the first year of production.
Assuming that is a Winchester Model 88, values can run from 550-700 dollars- depending on condition, and whether it is pre 1964.