Sotheby's holds online sale of Supreme collection From keychains to a pinball table, a huge privately-owned collection of Supreme accessories has gone on show in Hong Kong ahead of an online auction. The online-only sale of 1300 items from the US-founded skateboarding and clothing brand is being held by auction house Sotheby's. The sale is a way for the art broker to "engage the younger generation of collectors", says Shea Lam, specialist in contemporary art at Sotheby's. IMAGES AND SOUNDBITES.