I inherited some coins – how do I find out what they’re worth and what should I do with them?

My grandfather recently passed away and left me his coin collection. It's about 200 coins in total - mostly older US coins (some silver dollars, wheat pennies, and what look like Buffalo nickels), plus some foreign coins he collected during his military service.
I'm completely new to coin collecting and honestly have no idea where to start. The collection is in a couple of old albums and some are in those little cardboard / plastic holders with handwritten notes.
My main questions:

How do I figure out if any of these are valuable?
Should I clean them? (They look a bit tarnished)
Is it better to keep the collection, sell it, or maybe keep just the special ones?
If I decide to sell, what's the best way to do that without getting ripped off?

Thanks in advance

Posted by Anonymous on 1:23 PM March 10, 2025