(JTA) — Letters, books and handwritten notes to the late New York Mayor Ed Koch were sold for nearly $24,000 at auction.

A 1992 letter from President Ronald Regan, in which the late president says “I never doubted communism would eventually fail,” sold Tuesday for $3,750 — well above the pre-auction estimate of up to $500 — according to reports.

A thank-you note from Jacqueline Kennedy Onassis went for $2,812.

The 18 lots sold by the Doyle New York auction house had been expected to bring in $5,300.

Other letters sold were written by Margaret Thatcher, in which the late British prime minister discussed anti-Semitism in Croatia, and by U.S. vice presidents and other political figures.

Koch died in February at 88. His furniture and artwork were sold last week.