[Sadden]

I would throw them in a cooler with hcm beads set at 55rh (based on your ambient humidty) and bring it up slowly over the course of a couple months. the longer the better. i rehydraated some cubans too fast once. split about 50% of the wrappers. these guys didnt lose much if any flavor though. they were sealed as well.

I would rehydrate them as mentioned above and try one or two yourself. Get to see what your dad was into. and then you can tell potential buyers you have tried them. then at least people know they dont have construction issues as a result of the storage. who knows maybe you will get into the hobby meet some cool people and hang onto the cigars and keep them. smoke one on your dads birthday every year or something. if you try em and dont like them then you can sell em.

Respect to you for being upfront man. The world needs more people like you.
My condolensces on your loss as well.