The Lifemarket was located on Bryce's Asteroid. It featured stalls selling body parts, cutting tools, coffins and other scientific paraphernalia. According to Elspeth, one of the stall owners, it had everything needed for "genetic experimentation, body beppling, transplantation, cross-breeding, mutation, artificial fertilisation, plastic surgery."
Much of the Lifemarket was destroyed when the Sixth Doctor reprogrammed the dead bodies of Military Hardware and they went on a rampage. (PROSE: A Star is Reborn)