Remington Model 10 shotguns

I have ten Remington Model 10 shotguns all in working condition plus numerous parts. My grandfather willed me his when he died in 1960 and I purchased the rest in the late 60's/early 70's at auction in North Dakota. Do they have much value and where could I put them on an online auction or for sale?

Please email me at [email protected] if you can help me on this. I am getting in my 60's and want to sell these shotguns (except my Grandfathers of course) as I obviously hunt with newer shotguns nowadays.