From what I observe on a daily basis, a large number of people want to buy a piano or at least, they would love to own one. When a person is introduced to a piano, he or she is never done in terms of learning about the piano and the music, as the piano is able to introduce the beginners to music and offer everything else to the advanced learners. Yamaha pianos are very popular because they are reasonably priced and the quality is very good as well, you just need to know what to look for.
Many people feel that the used pianos from the Yamaha brand are better than the new ones,
Buying from Professional Dealers/Individual Dealers
In Atlanta and other cities, you can purchase used Yamaha pianos from music stores and individual sellers. It does not matter where you purchase it from, as long as you check the service history from the sellers. Think of purchasing a used piano as buying a used car. You will definitely ask for documentations and the history of the car to know if it has been in any accidents. Additionally, you will want to know if the car was taken care of properly.
Generally, pianists get their pianos tuned at least two times per year. If you play your piano frequently, it needs to be tuned more often, which must be at least once every quarter of the year. You will find various reasons for this and the first reason is because the strings in the pianos from Yamaha move ever so slightly when the key is hit. This is partly the reason why the more you play it, the more often you need to tune it, so that the tone quality does not decrease. Pianos that are not used regularly need to be tuned because of atmospheric factors.
Materials Used to Make Yamaha Pianos
To produce good quality pianos, manufacturers use wood, because wood is predisposed to environment issues. It can be extremely difficult to obtain the right environment for the piano 
Even though there are people who find used pianos better than the new ones, it is important that you check on the condition of the used piano before you buy it. It is not only the outer part of the piano that is made of wood, but also the internal parts, such as the hammers, which means they can easily be moved due to the imbalance of moisture and temperature levels.
Personality/Characteristics of Pianos
Many musicians or pianists around the world feel and believe that each piano has its own characteristics. Each one has its own quirks that only you will know by playing it frequently. It is the same with used Yamaha pianos. Therefore, you need to test all the used pianos before you invest in one to see if you can adapt to their few quirks. Tuners or technicians should know about these quirks, as well, which means you should consider buying from a dealer who is responsible for the tuning too.
Which type of used Yamaha piano would you consider buying?