What is the price of a door lock actuator on a 2004 Jeep Cherokee?

Via the Autozone website, it depends. There are three:

  1. Dorman/Door Lock Actuator, Part Number: 746-260, Trunk lock actuator; Tailgate $89.99
  2. Dorman/Door Lock Actuator, Part Number: 931-002, Door lock actuator; Front - Passenger side $125.99
  3. Dorman/Door Lock Actuator, Part Number: 931-001, Door lock actuator; Front - Driver side $114.99

You may be able to locate cheaper parts at a local parts salvage yard. The reliability of such will not be warrantied however.