Sagging floor

Moisture readings are normal???

What moisture readings are you taking?

I would never be dishonest like that even to a dealer. I did check and the moisture readings were normal.

Trade it in as soon as possible.

You have a water leak that has already caused massive damage. The leak is probably tiny, undetectable, impossible to find, and impossible to fix...let alone the massive amount or work it would be to find the damage in the roof, walls, and floor.

Don't tell the dealer about the sag or the leak.

Take the hit now...hopefully it won't be too bad.

Unload it while you still can.