Depending on the age of the manufactured home, you may be able to sell it through a real estate broker, but most of the time an older (more than 5-10 years) manufactured home has very limited value. Many mobile home parks won't take them, and if the manufactured home has been moved from its original site, it can no longer be financed through FHA.
There are also other questions that need to be answered. First, was there a "title elimination" done? If so, then you'll need to check with Pierce County about re-titling the manufactured home so that it can be sold separately from the land. If there is a mortgage on the property, that may not be possible without the permission of the lien holder.
Often, owners of older manufactured homes find that the amount of time, effort and money needed to sell and move their manufactured home is worth more than they can get for it.