Bruh, if it makes sound then it's worth it. And a $60 piano is worth its weight in gold since you'll have a piano and be able to make sounds with it. If the sounds aren't what you should be expected to make then c
um on them and make cool **** anyway. It's ****ing music, dude. Just have fun. Your band teacher can kill himself and the world would probably be no worse off.
https://en.wikipedia.org/wiki/Prepared_piano