Even if you purchased your new Keystone for 30-35% under MSRP, you will still get "beat up" if you try trading it in.
I would attempt to sell it outright first, get back as much money as you can. Then, as others may have suggested, find the right floor plan you can full time with. Then if it was me I would begin a search for a 3 or 4 year old fiver with that floor plan. I would search Craig's List and RV-Trader in a 100 or 200 miles radius and concentrate on private sellers.
You may just come out of this deal with more living space, a little less money invested, and a fiver more suited for full time use.
