Sounds like you have your work cut out for you!
Here's what I would start with:
Nickels: WWII issues (mid 1942-1945) are 35% silver and worth about a dollar each. They have a large mintmark on the back. S mint nickels (50s and earlier) also tend to bring a premium. 1950-D is a key date and worth about $6.
Pennies: S mints are good, and there is a rare small date 1970-S that is worth about $30. Some 1969-S also have doubled lettering... these are rare and valuable. All pennies 1959-81, and 95% of 82 are 95% copper. Some people hoard these, but I wouldn't unless they are flashy red. The copper value is worth about 2 cents each, but nobody will pay that because they are illegal to melt.
Bicentennial quarters are worth face unless they are flashy and uncirculated. Everyone hoarded them (and still do) so they do not command much in any grade.
The world coins most likely do not have anything of real value. 99.9% of all modern European coins have high enough mintages that they are almost worthless. German deutsch marks are still exchangeable for Euro at 2DM = 1 Euro, if memory serves? Is there a story about how he acquired them? If so, that story is worth more than what ebay will give you.
The gold plated coins are just novelty, worth whatever someone will pay.
And of course, anything that reminds you of your grandpa is priceless! I would definitely keep at least one that catches your eye as a memento.
Edited by Finn235
11/10/2016 2:09 pm
11/10/2016 2:09 pm














1 Pfennig 1948 J,






