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The best way to determine this is to Google the year, make and model of what want to find and see what the ones for sale are going for. Then figure out where yours is from the descriptions given. There is a Blue Book for most RVs, but you have to know exactly what equipment it has and they are usually too subjective. This may be on a Ford chassis, but it should have some brand or manufacturer who made it. "Aluma lite" is used by several of them. I don't recognize "55000" as any model number. Perhaps check on that part as well. Please get back to me if you get more and I can direct you further. All follow ups are included in our fee.
You still need a make and model in order to look it up..............Ford is just the chassis they used. Who built this?
Is it a Holiday Rambler? Go to the following link to view some.........with prices. http://rvs.oodle.com/1989-holiday_rambler/for-sale/
Notice that they have various models in a number of lengths.........which makes a huge difference. Please get back to me if you need more as all follow ups are included in our fee.
O.K............let me know if it is something else.
I can't tell you much without knowing who made this.............that makes all the difference!
Kind of like telling me you have a Ford truck, but don't know if it is a 1/2 ton or one ton and what equipment it has. There has to be more detail here.
Then find out what the length is and that gets you a whole lot closer..........
Here is a link to a whole list of Holiday Rambler units for sale.........http://www.rvtrader.com/Holiday-Rambler-RVs-and-Motorhomes-For-Sale----RV-Trader/search-results?make=Holiday%20Rambler%7C2268962&sort=geo_distance%3Aasc&
Did you go look at those for sale and see one like yours?