I got a piano for ds7 3 years ago. I started lessons myself when I was 5 1/2 with a piano for many years. Then I had a keyboard for a long time since I was moving around. I did not like how keyboard feels. The sounds were different. The keys were not weighted (?). There is not enough octaves on my keyboard to move around. When I started ds on piano, I decided it was time to buy a real one.
I did not want to buy a brand new one. They were very expensive in a piano store. I just wanted a name brand 2nd hand. Craig's list was where I found mine. I have seen almost brand new pianos for very good prices. I have also seen people trying to get rid of their piano and wants you to haul it away. Watch out for old pianos, especially the free ones, because their pins in the piano cannot be tuned or they will break. I wouldn't get the old and free ones.
