Kazzlehorf does trade.  The best trader in the Galaxy is Kazzlehorf.

Kazzlehorf will give you lots of dead non-Kazzlehorf (*basically any Kazzlehorf that started calling itself a different name and/or behaved in 'non-Kazzlehorf' ways*) to feed to your animals in exchange for slaves and whatever fun toys you are willing to share.  Kazzlehorf really likes the cyan goo.  It's nice for a good ol' planetary bathing.