Beware museums, once you give them something it is theirs, they can sell it out the back door and do. The flintlock guys have mentioned giving a museum their family heirloom rifle and it was never seen again.
There was an artifact museum downtown that had a back door reputation of black market sales, the money was pocketed by the guys who ran the place. Guys who collected told me this, I didn't have any first hand experience.
The above mentioned museum was torn down, a new one was built and run by the state, the shady stuff stopped, I even donated a bowl to them, I am pointing to it, it is the one with the chip out of it.
A big collection will take a while to access and catalog, mine wasn't that big but my son and I spent a whole day sifting through it before I gave the stuff to my granddaughter.
If he has any paleo fluted stuff they can go for 10 to 15K each now. Prices have skyrocketed.
Although the sales of artifacts is generally frowned upon, I have friends who have made big money selling parts of their collection.