Refurbish or not|Winchester Shotguns|Forum|Winchester Collector

I have a Winchester MOD.20-410 that was my grandmothers. The last time it was fired that I know of was when I last used it in 1985. It is in as good of shape as it was back then. I spent 22 years in the military and its been in a safe the entire time. Is it best to leave something this old as is or should I find a place to refurbish it (what ever that may be for something of this age)

I have a Winchester Model 1400 MKII and a Remington 1100 that were my fathers not sure I need them both but they are at least 30 years old are they common enough that I can sell one or should I keep them both.

I have a Remington 870 express I purchase myself in 1986 I was thinking of setting up for home defense.

V/r

Joe