A collection of nine copies of the avant garde Aspen magazine, published in the mid to late 1960s, have sold for $4,200 at PBA Galleries.
The auction took place in San Francisco on April 10.
Each issue consists of a box containing a variety of different materials, ranging from booklets and postcards to film reels and records.
Contributors included writers, artists and musicians including Andy Warhol, John Cage and William S Burroughs.
A letter included in the first edition set out the publication's manifesto: "In calling it a 'magazine,' we are harking back to the original meaning of the word as 'a storehouse, a cache, a ship laden with stores."
Click here to sign up to our free newsletter.