Gun prices vary between Canada and the US, however there are recognized price ranges. I have the 2013 "Gun Digest book of Guns and Prices 8th Ed" in front of me. There are nearly 80 pages of all models of Winchester, so details are important. They use New In Box, Excellent, Very Good, Good, Fair and Poor as grades. Each one has a paragraph of condition statements. I'll be happy to give you the benefit from one source of information.
Model
Make Winchester
Serial number
Cartridge 30-30
Barrel length
Barrel shape
Butt plate style
Type of wood
Drilled for a scope base y/n
Stock repairs
Missing parts
If a commemorative, with box, fired?