Shortly after we got married, my wife and I took possession of a 1918 upright piano that had not been tuned in a long time. We didn't know enough about pianos to know better, so we spent considerable time and effort to transport it 40 miles and up a short flight of stairs into our new home... only to dismantle it by hand less than a year later and slowly throw it away. It couldn't be tuned, and it took up too much room to keep if it wasn't going to be played. I think we sold the cast iron soundboard as scrap for a few dollars, and I did save some of the larger pieces of wood, which I used to build a bed for my two-year old son a few years later.
As a side note, if you've never taken apart a piano, I highly recommend it. You get a specific understanding of its inner workings, even if you think you already know how it functions.
Pictures of the piano disassembly:
With the keyboard removed: http://farm3.staticflickr.com/2193/2299985304_d0b38313f6_b.j...
The keys that I saved for a long time but never found a use for: http://farm3.staticflickr.com/2091/2299984652_a024f4a05e_b.j... (They're like teeth that have been knocked out: much much longer than you'd expect.)
The soundboard exposed, and the huge screwdriver I had to buy (see the top of the photo) to remove the screws attaching it to the wooden back: http://farm4.staticflickr.com/3105/2300002756_92e8503676_b.j...
The soundboard removed: http://farm3.staticflickr.com/2217/2300002188_68c614d900_b.j...
Just a portion of the screws and other hardware holding it together: http://farm3.staticflickr.com/2095/2299206761_ae640697d9_b.j...