I have never found anything of value in an old house, cabin, or barn. A friend of mine (who is gone now) was buying up farms in the late 50's and early 60's. If there were buildings on the place he would take a look in the attics and crawl spaces if they had one and if nothing was there he would doze it in a pile and burn it. One farm he bought had two Winchesters in it. A Model 12 12 ga. built in 1924 and a 1895 lever action in 30-40. They were in a closet in the living room of the farm house just leaned against the wall in plain site. He used the model 12 as a pheasant and duck gun for years.