Next, your agent should understand what marketing techniques work--and which ones don't--when selling a mobile home. For example, lots of leads will come from a sign in the window. (Often in parks you can't put in an in-ground sign.)
What that means, in part, is that the agent will get a lot of calls from people who know nothing more than the address of the property because they've driven past it. They won't know the number of bedrooms or baths. They won't know the listing price. They won't know the ground rent. They won't know what services may or may not be covered by the ground rent. They won't know what qualification requirements are required by the park management. All of that will be on your MLS listing--it's just that people who drive past and see the sign won't have checked the MLS.
Another marketing tip: Your agent should saturate the park with direct mail or with other methods to let the other people living there know about your property. Families (including extended families) tend to group together. For example, I recently sold a manufactured home in a park. It'd belonged to a woman whose nephew lived two homes down. Four other homes in the park (about 450 total) were lived in by other relatives of the same family.
Your and your agent also have to talk about what sort of financing a buyer may need or want. There are a few companies out there that will lend on mobile homes. Not many, but a few. Make sure you have that information. But a lot of potential buyers may not qualify. You may be expecting or hoping to receive all your cash at settlement. But you'll open up the market to many, many, many more potential buyers if you can offer some sort of seller financing. I don't know if you're in a position to do so, but it'll help sell the home much quicker.
Hope all that helps.
You need a realtor that specializes in mobile home sales in your area. Have you tried googling mobile home specialist in your city?
I would also check with the mobile home park owners, often they have someone they refer you to or have provisions for you selling real property on their land. I dealt with this in South Austin and we actually ended up selling directly to the owners of the park (it's always worth a shot to see if they are interested in purchasing since it's already there).
Best of luck in selling your home!