Unglued Hammer Felts
If you see unglued hammer felts like this on a piano you’re considering buying, then reconsider. Those hammers can’t be effectively repaired. Replacing the hammers is the only option that results in good tone. And that is expensive ($750+) So unless you are willing to spend (a lot) on repairs as well, don’t buy the piano. Don’t even take it if it’s free, because I’ll almost guarantee you that if the hammers are like this, there is expensive damage to other components as well. So, unless the piano has some really strong sentimental or other intangible value to you, pass on it and find another piano that’s in better condition.