Someone Wants To Buy Out Kim Kardashian Sex Tape

TMZ has learned the mystery buyer has hired a lawyer in Tennessee -- who fired off a letter to Vivid honcho Steve Hirsch yesterday which reads, "I was approached by a private party who has asked us about looking into the possibility of acquiring all rights of the Vivid, 'Kim Kardashian Sex Tape.'"

The lawyer adds, "The party we represent does not intend to distribute or broadcast the 'tape,' but hopes to completely remove it from the market."