Does anyone know of someone who will buy coin collections that don't have any gold or silver coins?

my father is relocating and has a rather substantial coin collection that he's looking to unload. does anyone know of a coin buyer in southern california that will look at, appraise and possibly buy coins that are not gold and silver??? mostly non circulated regular legal tender coins..or would it be better just to use them for the cash value? would appreciate any help you can give me on this..