I would have passed my collection on to family if there were even one person who was interested. I started collections for my son and my daughter when they were young. Neither of them stayed with it. There is no one else. Every time I found an interested younger collector I always gave them hundreds of stamps, but as you know such youngsters are impossible to find any more. My collection was world-wide issues up until about 1970 with several exceptions including Spanish speaking countries, Germany and the United States. My old German collection is still worth something even though I sold many of the best ones several years ago. My old USA may have some value to it but I no longer have the incentive to go through all of the identification needed for the many every early ones. I will probably leave them for my wife to sell the whole things to some dealers for effectively nothing when I am gone.I have done that too.
Just recently I decided to sell off all of it.
Been in contact with dealers and collectors and I decided to keep it all and pass it on in the family.
To much hassle and I don't need the money.
My collection is The Netherlands and all the colonies.
Russia, Poland, France, and a few other European countries.
Oldest stamps are mid 1800's.
I have 8 shoeboxes packed with first day covers.
Also lots of old coins.
I never collected first day covers, but I have quite of few of those along with lots of miscellany [such as non-stamps from many countries, Christmas seals galore and tons of old postcards]. My mother used to collect antiques and whenever a stamp collection came up for auction she would buy it for me. Stamps never sold well at antique auctions so she picked them up for next to nothing. She loved to have me go through them and tell her how good of a deal she got. For me, of course, it cost nothing.