I can imagine my heirs facing the same thing some day, though I hope to give them some guidance before I pass on. It would be nice if some of the more experienced members of SCF with knowledge of such might suggest some dealers who offer to evaluate collections/estates. I might look through APS for ads, but the poster here likely wouldn't know how to evaluate dealers, let alone evaluate the stamps themselves.
You know what would be nice? A "sticky" post with suggestions for those facing this problem. Recommend dealers to contact, that kind of thing. I imagine it would be different for different kinds of collections. In my case, my collection is heavily weighted toward airmail first flight and first day covers, so for a collection like that, I imagine the recommendation would be different than for a dealer to evaluate a collection of 19th century US postage, not to mention various other nationalities. But I see ads all the time offering to buy collections, so I think it would be useful to have a post we could point to when getting questions like this. While I would expect it to be mostly neutral, if users have experience with specific dealers that they would recommend, that would be helpful.
At the same time, I think it only fair to warn people that selling entire collections to a dealer is only going to get pennies on the dollar of what the collection might bring if auctioned off bit by bit by someone knowledgeable. Does anybody have enough experience to offer guidelines on just what to expect, besides "pennies on the dollar?" E.g., if a collection has a "Scott Catalog Value" of X, how much would a dealer typically offer to buy it? 10% of X? Less? More? I know that there are lots of variables and unknowns in a question like this, but surely there are some typical rules of thumb, or ballpark estimates to bandy about.
Something like this: if the SCV of a collection is X, a knowledgeable collector might be able to get 40-50% of that selling it piecemeal, over time, on
ebay. Selling it outright to a dealer may only bring about 5-10%. Obviously, culling out the more valuable items, and selling them off individually, and then selling the rest outright would probably bring something in between those extremes. Sound about right? Or would you beg to differ?
Basil