I hate to discourage you but in the market right now you would be very fortunate to get 25,000. I'm selling a 1989 Manufactured home for 48,000, well I should say trying to sell. Because of that I have been watching the market and the pricing ranges from 10,000-150,000 but the ones that go for the least are the mobiles. My next door neighbors (and friends) had an older mobile they gave it away, and still had trouble finding someone to take it.
Sorry to be a downer but my suggestion is if you can wait, then wait til the market goes back up, then you should be able to get what you want out of it.