You can use an agent either way but if you decide to go the FSBO [For Sale by Owner] route it does make a bit of a dfference.
I can send you some sold data if you wish so you and your Mom can get an idea of the market, just call or email me directly and let me know which park she is in.
It's not whether they do or don't have "HUD LABELS or INSIGNIAS". It's whether they have a HUD/HCD approved and certified foundation system properly installed and if so if it has an engineered certification and "Housing and Community Development Department" (HCD) required 433a documentation.
"or are they licensed trhough the DMV and considered vehicles on blocks?"
There are very few mobile homes (built before June 15, 1976) that are tagged annually by the DMV anymore. From that date on the regulation and jurisdiction of the entire MH industry was given to the HCD who has been in control of the MH's every since.
Homes that are still tagged annually by the DMV are very scarce nowadays and whether or not they have "blocks" under them is of little significance inasmuch as there are several HUD approved foundation systems throughout the USA that are on "blocks".
Now if you select a RE professional who also has a MH sales license and understands all the nuances that relate to the MH industry that's a different story. Or if you're in an MH condo conversion where you own the dirt or air space as well that's a different story. Then you would have to use a licensed RE professional.
Check out our websites for more info. We'd be happy to direct you to a qualified MH professional in our area at no charge.