The other day I was taking my garbage downstairs to the little garbage building outside of my apartment building, and I found this guitar just sitting there propped against an old rusty refrigerator. You might think I'm lucky to have found it, and I would agree, but this type of thing is much more common that you might at first believe.

Once I got it back to my place, all I had to do was clip the strings off and spend an hour scrubbing. Most of that time was spent removing gunk from the fingerboard. What little research I found on the net indicates this guitar was made between the 60's and 80's. At least 20 years of use can really gunk up the fingerboard.
After it was clean I spent 400 yen on strings (on sale @ 1/2 price), 200 yen on 2 picks, 500 yen on a strap, and 500 yen on a capo. 1,600 yen total (around $16) for a guitar with a beautiful sound is definitely worth the effort!
In Japan, if you don't use it any more and you don't want it to take up room in your house any more, you throw it away. I found 3 bookshelves and a coffee table in that same little building, and they were all in good shape and for the most part only needed a wipe down. The coffee table needed the top glass replaced, but 1,400 yen worth of Plexiglas solved that in no time. If you go out on trash day in a nice neighborhood, there is no end to the found treasures. (and I live in a run down part of town!)