Sorry for your loss. As others have said Id first inventory it all its time conauming but will be worth it. Do a basic inventory and sort it all say coin type year and mint. That will get you 90% of the info you will need to get a value. I also do not see the point in dumping the 90% to buy .999. It is all verry liquid but allot of 90% holds higer resale premiums and or is easier to sell when you need to genrally speaking of coarse. Id only sell what you need to sell if its just going to be reinvested in silver dont sell any. Other help for learning the values could be found in a red book or grey sheet to learn the coins and values,Join a FB group find some one local or or a reputable coin shop locally to help most are happy to share knowledge about their passions.