Hello,
It's hard to say for sure what you have in terms of value, but the best way to liquidate may to sell to a coin dealer who specializes in both U.S. and world coins and who buys in volume. Thankfully there are many good dealers who fit that description. You can find a searchable list here:
https://png.memberclicks.net/find-a-png-dealer
I'd start calling coin dealers who fit this description and ask if they are willing to evaluate the lot and get quotes (to compare) from various dealers who are open to buying the entire lot.
It's possible you may have rarities among the coins that could be sold individually, but if they are there they could help fetch a better quote for the lot and make it more marketable to dealers who are offering to buy.
I hope this info is helpful to you!
Good luck!
Josh