[aigel]

Considering now old everyone is on this board, I'd say your MIL may be retired and have some time? How hard is it to look up coin values online and get an idea? It'd be a fun activity. I have looked up values on coins I own or found in my wallet with the help of my curious kids. I.e. I know what a wheat penny or a pre-64 silver containing quarter is worth ...

Also, if any of it is precious metal like silver or gold, you can get a good idea on the spot value of the material as well. I would not be surprised if the coin dealer's offer was based on spot price and everything above it (numismatic value) will be his profit.

G