30 yr collection

[lisa]

I have a 30+ year collection of shells - 1000's of shells, some of them rare according to my grandfather. He collected while in the navy / dove as a hobby. He is now 85 yrs old.
I would like to sell for him but I do not know which avenue to approach?
We have photos of my collection-he gave each grandchild (6) about 500 to 800 each.
It would be exciting for him to be able to sell them to someone that would appreciate them.

Thankyou,
Lisa