All component are separateBecause the piano was been usable for long ago make glue that used in joining wood face and all component are separate. Rust on the piano wire- Rust make not good trembler of piano wire and when have setting sound level the piano wire may can tear. A split of piano bodyUsed piano will have the transportation more than 1 time and have the long time ago usability moreover, the piano usable in all country will have the difference in about the moistness therefore it have more possible that piano wood area has will the chasm or broken and many times a customer no observe or look around outside state of the piano that have already repairing color in the chasm part or broken?Hammer HeadIf the woolen fabric at hammer head be worn, hard and have deep rut it have make decreases quality of sound to lower.When the piano have rust it will can not tune the sound level correctly which will affect listening of a student. The component within mechanicalthe piano have many mechanical within itself which most mechanical build hot melt film for fabric from the wood, woolen fabric and the leather when these components was used for long ago it make to deteriorate then it will have difficulty to repair for good as before how we are will certain? that is the good quality piano and have enough standardized.Used Piano is the piano that has already use the majority of used piano will has usability about year old which, it not good piano again moreover, it no have the standard for learning and training which can divide used piano to type that is.Rust will spread out to other component of the piano and will make other components receives the damage too.From the above information enough guide for your choosing to buy the piano and worthwhile with money must pay out risk rate in buying used piano has more rather and technician no have standard therefore piano buying should buy the new piano from the agent and should consider the guarantee and trust serve from work specialist who is trained from producer factory only. InsecticideIn old some piano will may don't meet the insecticide because the skin coats ability from a factory doesn't lose but for very old piano and the skin coat already lose will has use the insecticide for prevention and eradicate an insect that eat the woolen fabric which will bad for health of student and they family.2. The key doesn't be equalIt will make affect to the student development of finger may make the movement of a finger can work slow. The piano that don't repair or without recondition it have very popular because it have low price and bring repair by oneself which more cheap but it no have the standard moreover the vendor will have many profit as well.Disadvantages of used piano.The piano that has repair or recondition from producer factory kind this piano doesn't popular in the bringing to sells because it have expensive when bring to sell it price will a few different from new piano which make the vendor has a little profit. An insect eats the woolen fabric under keysIt will make affect all playing technique and board touching.