Well if you are not into RVing and you don't want to use it for extra guests at your house then I would sell it. A potential buyer will want to make sure everything works, no leaks, body in good shape, enterior good, engine runs good, and tires are under 5 years old. Given that you might be able to get $3k to $5k for it. Go on craigslist and look at simular MH in that age and size. That will give you an idea of current value. The only problem is that it is 27 years old. I have an 87 Allegro and the value to sell is no where near what it is worth. Based on age.
2017 Grand Design Reflection 303 RLS
1997 GMC Sierra 3500 Dually