And who actually cleaned up form this sale ?(other than Sothebys, of course)
https://thetimes-tribune.com/news/millionaire-killer-s-stamp- ... -1.1704687
Under du Pont’s will, 80 percent of the proceeds from the sale will go to former wrestler Valentine Jordanov Dimitrov of Sewickley and his family members. The remainder is designated for the Eurasia Pacific Wildlife Conservation Foundation, based in Paoli, Pa., which du Pont founded.
Dimitrov, 54, won a gold medal at the 1996 Atlanta Olympics representing Bulgaria. He gained notoriety in 2013 when he returned his medal to the International Olympic Committee to protest its decision to drop wrestling from the program.
The will was contested several times by du Pont family members but was most recently upheld in 2012 in local and state appellate courts. Attorneys involved in the appeal have said the last formal deadline to appeal the will expired in November.
Sotheby’s spokesman Rocha would not elaborate on the distribution of proceeds, saying only that the stamp is being sold by du Pont’s estate.

John Du Pont and Valentine Jordanov Dimitrov

Dimitrov in action
According to wikipedia in 1990 Dimitrov emigrated to the United States, but he also continued wrestling for Bulgaria until 1996. He won a bronze medal at the 1992 Barcelona Olympics in the Freestyle Flyweight 52 kg event and a gold medal in the same event at the 1996 Atlanta Olympics He is a seven-time world champion, seven-time European champion, and the only wrestler to hold 10 medals (7 gold, 2 silver and 1 bronze) from World Championships.
He retired from wrestling after the 1996 Olympics. In 1997 he became a member of the Athletes' commission of FILA, and was the President of the Bulgarian Wrestling Federation from 1998 to 2007. He has been a member of the Bureau of the Bulgarian Olympic Committee since 2000. He is married and has two children.
The will of American multi-millionaire John Eleuthère du Pont bequeathed 80% of his estate to Yordanov and his relatives.