I don’t know if you could still buy it, because the add was posted on 2008-01-15 on craigslist.
The add sounds like this:
For Sale – beautiful pink "vagina couch" that I made in art school and no longer have space for. The couch is large: measures 5′ 3" long, 3′ 3" wide at the middle, and stands 2′ 3" tall (and is heavy like a couch). The pics are from my portfolio and are several years old; as a result, the couch has some scuffmarks and stains around the bottom from being moved, but otherwise is in excellent shape. A professional upholsterer helped me build the couch, so it is also functional and durable as a piece of furniture. The couch must be picked up in Mendocino, a 3-hour drive north of SF. I am asking for $600 and a loving home!