Lenders will not lend on a mobile home built prior to 1978 so you will only be able to sell it to a cash buyer. You will have to look at similarly aged mobile homes that have sold. Be sure to search within one mile if suburban, 5 miles if rural and .5 mile if urban for any other mobile homes that are similar in age. You can adjust for the difference in square footage, lot size or land value, amenities to the property, condition and any other relevant factor that may affect the value. Search for similar properties that have sold within the past year. In the MLS, for these type of properties, it is generally advertised as land only, the mobile home has no value if the mobile home is built prior to 1978, cash buyers only. The main value of this property will be in the land if attached to the land. If it is not attached to a lot then the value will be based on what other properties have sold for that are not attached to the land. So when valuing the property you need to determine first whether it is attached to the land or not and then compare it to properties that are similar to yours that are attached if yours is attached or not attached to the land if yours is not attached to the land. It is not appropriate to use properties that are not similar in that factor. It would basically be classified as owned lot or rented lot and those two types must be valued separately within its own respective categories.