The place to go is PianoAdoption.com, where people can list their pianos at no cost. You can scroll through the listings by state to see what is available here in Illinois. You’ll need to hire movers or a truck, and you will probably need a technician to repair and tune the piano at its new home.
Even with the cost of moving and repair, the used piano may be cheaper than a new one. This is especially true if you are looking for a piano as decoration rather than as a musical instrument and have less concern about the quality of the play.
If you’re looking for a more portable instrument, you probably won’t be able to get it for free. That’s because the moving costs are cheaper. In fact, some instruments, such as violins, increase in value the more that they are played from the effect of the sound waves on the wood. One resource, that lists and evaluates used instruments, is Elderly Instruments. Craigslist is another good place to check out.