Later years and death Mardas put 15 items from his collection of Lennon memorabilia up for sale on 5 May 2004 at Christie's in South Kensington, London. Among the sale was Lennon's leather collar worn during 1967 and 1968 (at the launch party for the Sgt. Pepper's Lonely Hearts Club Band LP, and on the cover of Lennon and Ono's Unfinished Music No.1: Two Virgins), as well as a custom Vox Kensington guitar, a coloured felt pen drawing called "Strong", and a pen and ink drawing by Lennon entitled "Happy Fish". Mardas said he planned to donate the money to a charity in Greece. The "custom Vox Kensington guitar" later sold at an auction for £269,000 on 19 May 2013. Mardas lived in Athens until his death on 13 January 2017 at age 74 from pneumonia.
Later years and death Mardas put 15 items from his collection of Lennon memorabilia up for sale on 5 May 2004 at Christie's in South Kensington London Among the sale was Lennon's leather collar worn during 1967 and 1968 (at the launch party for the Sgt Pepper's Lonely Hearts Club Band LP and on the cover of Lennon and Ono's Unfinished Music No1 Two Virgins) as well as a custom Vox Kensington guitar a coloured felt pen drawing called "Strong" and a pen and ink drawing by Lennon entitled "Happy Fish" Mardas said he planned to donate the money to a charity in Greece The "custom Vox Kensington guitar" later sold at an auction for £269000 on 19 May 2013 Mardas lived in Athens until his death on 13 January 2017 at age 74 from pneumonia