Nearly all my pipes have been estate purchases. Thanks to the information gleaned here I use a salt/alcohol, retort, stem cleaning and general cleaning and polishing before using an estate pipe. All these steps have been covered in this forum and are simple skills. I do not hesitate to send a pipe to a professional if I don't feel up to the job for any reason.
Once a pipe is cleaned, and dedicated to a blend or type of blend, then the salt treatment is not part of regular maintenance.