The main purpose when you buy mp3 player is to store then listen to your favorite songs and music. As such, you have to be particular with the playback quality of your mp3. Many cheap mp3 players have poor playback. It is because these are compressed music where audio quality is oftentimes compromised. However, there are also affordable kinds that can be quite good. But then, it is important to put quality over price. You would not want to listen to bad sounds!