Just a good grade of gun oil periodically.
Some use transmission fluid for a lubricant, I wouldn't use it for an external rubdown.
My oldest 94 is a '51, it gets an occasional rubdown with a very lightly oiled cloth. Gets a lightly oiled going over whenever it's fired as part of the cleaning process.
In 1925 Winchester was still building custom orders to a customer's preference, not just the standard line.
Giving you a realistic value would be impossible without some good photos, there's no way to know based just on what little info you've given.
It could be $500 or $5000, to start with.
Your definition of "good condition" might not jibe with a collector's definition.
Any non-standard features could raise value.
Some alterations to original form (shortened buttstock, shortened magazine, etc.) could devalue it.
A quality factory period deluxe sight could add value.
If you had any photos of the original owner with it, that could affect value.
Any provenance linking it to a researchable lawman, public figure, location, or event could affect value.
An original bill of sale could add value.
The scabbard (depending on what it is) could add value. If it's ever been refinished, or if you have it refinished, value will drop.
And so on.
Denis