Depends what you mean by ratty. Rat infested, roof leaks and totally rotted out, or still serviceable?
RE getting it out without the stablelift. Set it in there on something slippery, like a big piece of visqueen folded in half so it "rolls" out. Drive carefully to the dump, no tailgate and I bet you can wiggle it out, or tie a choker around it and have them pull back until it's half on the ground. May have to crib up the overhead though so it doesn't hit the truck bed......or load it in backwards for its funeral procession.