My father passed on leaving behind a model railroad collection to die for.
But it was only the best of the best left when he passed. He sold the other 75% to a store for a good deal when we made it clear 'dad, only you know what it is worth and who to sell to, and we would rather you enjoy the cash while still around'.
He gave some good items to a friend that had earned it from his friendship. The sale went to a local retailer though.
Father passed and the family basically had no real interest other than myself. I don't believe in the afterlife by the way. He was here and now he is gone, end of story. He lives on in his collection as i see it. My last words to him 'I'll be seeing you in your books dad'. His reference library is safely held with mine away from the uninterested and largely no understanding attentions of the rest of the family too.
Now when I pass, well I suppose Dad's stuff will be on it's own like mine will be. I have tried to make it plain my stuff is actually valuable to someone, but, if it gets junked, well, it will be THEIR loss, as I will be gone, and won't be in a position to care.
Worth is subjective though. I have met people that wouldn't give you 5 cents for something worth 50 or 500 or 5000 bucks. I KNOW is a thief broke into my home, the loser will almost certainly miss the boat on what is actually valuable. They will steal the electronics, might smash the models and will almost certainly not realize the books are the only thing impossible to replace without a massive cost outlay.
My dad's trains are worth more than most mortgage downpayments. And that's the reduced collection. When alive, dad had the collection insured with more coverage than the house and the rest of the contents. On eBay, his collection could have bought a house on a single payment. But then most people on eBay are nuts too :)
I don't personally have a will, as when I pass, I will be gone, and my things will be someone else's headache. Hopefully the family has listened to me over the years. If not, tough luck to them eh.