I found a piano in very poor condition is it worth anything ? Maybe for parts ? It was in an old brewery from the 1800's

As noted in your other post, unless you can trace it to some famous performer, in good conditoin they sell for 200 to 400 dollars on craigs list, many of the old pianos, you can haul off for free esp if they are in someone's home, since they are so hard to move.
In poor condition, it is hard to tell, is the board that holds the wires broken, do all of the keys work,

Thank you for your answer >the piano is pretty much depleated and covered in pigieon poop. I was just curious since its just sitting up in an empty room