I am going to an estate sale with a ton of coins both raw and slabbed. The slabbed ones are easy enough to do a search on ebay to get an idea of prices. Anyone with a good app or website to plug in a raw coin and date to get an idea of its value?
US or World? For US, I use this: http://www.numismedia.com/fmv/ For World, I would highly suggest buying the Standard Catalog of World Coins. I think there are digital versions out there, but the books are nice to have on hand. Also, if you're going to buy coins that you don't know their value, I would recommend not bidding on them until you learn more.